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# Assignment 4 STA6507 – Nonparametric Statistics Fall 2021 Due at 11:59 pm

Assignment 4

STA6507 – Nonparametric Statistics

Fall 2021

Due at 11:59 pm on November 18, 2020

In this assignment we will practice using tests for contingency tables and rank-based tests; submit your code R with your solutions (R Markdown is preferred). Solve all problems but only two will be graded. Put those that you want me to grade at the beginning of your solution.

Problem 1

One hundred men and 100 women were asked to try a new toothpaste and to state whether they liked or did not like the new taste. 32 men and 26 women said they did not like the new taste. Does this indicate a difference in preferences between men and women in general?

Problem 2

A quick test for correlation between two variables X and Y, each of which has at least an ordinal scale of measurement, can be performed using the Fishers exact test. The procedure is as follows:

Divide the scatter plot of the N values of (X,Y) with a vertical line at the median of X.

Divide the scatter plot of the N values of (X,Y) with a horizontal line at the median of Y. Count the number of observations in each of the four quadrants. Note that the row and

column totals are N/2, and are not random.

Suppose that 16 observations pairs of X = age of marriage of a husband, and Y=age of marriage of his father, resulted on 7 pairs where both ages were above the median. Are the two variables positively correlated?

Problem 3

A random sample of stocks from the American Stock Exchange (ASE) is compared with a random sample of stocks from the New York Stock Exchange to see if any difference in the rating percent-ages of the two exchanges. Of the 23 stocks from the ASE there were 11 As, 11 Bs, and 1 C. Of the 35 stocks from the NYSE there were 24 As, 11 Bs, and no Cs.

What does your analysis look like?

1

Problem 4

A television-marketing rm would like to determine if the time of the ad appeared in television is related to the product being sold. The number of responses to the products rm is as follows:

Product

Fishing Rod

Kitchen Tool

Music CD

Exercise Machine

Daytime

6

73

55

7

Nighttime

14

65

82

8

Weekend

21

58

48

8

What does your analysis look like?

Calculate and comment the Cramer’s Contingency Coefficient.

Problem 5

Test the hypothesis that the following samples were obtained from populations having the same medians.

Sample1: 35, 42, 42, 30, 15, 31, 29, 29, 17

Sample2: 34, 38, 26, 17, 42, 28, 35, 33, 16

Sample3: 17, 29, 30, 36, 41, 30, 31, 23, 38

Problem 6

Random samples from each of three different types of light bulbs were tested to see how long the light bulbs lasted, with the following results:

A

73

64

67

62

B

84

80

81

77

C

82

79

71

75

Do these results indicate a significant difference between brands?

Problem 7

A blood bank kept a record of the rate of heartbeats for several blood donors.

Men

58

65

74

74

76

79

82

86

Women

66

68

67

69

72

73

74

75

76

1. Is the average of the rate of heartbeats the same for men and women?

2

Problem 8

7 married couples were selected at random, and each husband and each wife were asked how much money they spent on their spouses Christmas present year. The responses were as follows:

Couple

1

2

3

4

5

6

7

Husband

25

21

38

64

52

16

26

Wife

16

42

56

41

19

26

24

1. Does the husband tend to spend more than the wife?

3

## Assignment 4 STA6507 – Nonparametric Statistics Fall 2021 Due at 11:59 pm

Assignment 4

STA6507 – Nonparametric Statistics

Fall 2021

Due at 11:59 pm on November 18, 2020

In this assignment we will practice using tests for contingency tables and rank-based tests; submit your code R with your solutions (R Markdown is preferred). Solve all problems but only two will be graded. Put those that you want me to grade at the beginning of your solution.

Problem 1

One hundred men and 100 women were asked to try a new toothpaste and to state whether they liked or did not like the new taste. 32 men and 26 women said they did not like the new taste. Does this indicate a difference in preferences between men and women in general?

Problem 2

A quick test for correlation between two variables X and Y, each of which has at least an ordinal scale of measurement, can be performed using the Fishers exact test. The procedure is as follows:

Divide the scatter plot of the N values of (X,Y) with a vertical line at the median of X.

Divide the scatter plot of the N values of (X,Y) with a horizontal line at the median of Y. Count the number of observations in each of the four quadrants. Note that the row and

column totals are N/2, and are not random.

Suppose that 16 observations pairs of X = age of marriage of a husband, and Y=age of marriage of his father, resulted on 7 pairs where both ages were above the median. Are the two variables positively correlated?

Problem 3

A random sample of stocks from the American Stock Exchange (ASE) is compared with a random sample of stocks from the New York Stock Exchange to see if any difference in the rating percent-ages of the two exchanges. Of the 23 stocks from the ASE there were 11 As, 11 Bs, and 1 C. Of the 35 stocks from the NYSE there were 24 As, 11 Bs, and no Cs.

What does your analysis look like?

1

Problem 4

A television-marketing rm would like to determine if the time of the ad appeared in television is related to the product being sold. The number of responses to the products rm is as follows:

Product

Fishing Rod

Kitchen Tool

Music CD

Exercise Machine

Daytime

6

73

55

7

Nighttime

14

65

82

8

Weekend

21

58

48

8

What does your analysis look like?

Calculate and comment the Cramer’s Contingency Coefficient.

Problem 5

Test the hypothesis that the following samples were obtained from populations having the same medians.

Sample1: 35, 42, 42, 30, 15, 31, 29, 29, 17

Sample2: 34, 38, 26, 17, 42, 28, 35, 33, 16

Sample3: 17, 29, 30, 36, 41, 30, 31, 23, 38

Problem 6

Random samples from each of three different types of light bulbs were tested to see how long the light bulbs lasted, with the following results:

A

73

64

67

62

B

84

80

81

77

C

82

79

71

75

Do these results indicate a significant difference between brands?

Problem 7

A blood bank kept a record of the rate of heartbeats for several blood donors.

Men

58

65

74

74

76

79

82

86

Women

66

68

67

69

72

73

74

75

76

1. Is the average of the rate of heartbeats the same for men and women?

2

Problem 8

7 married couples were selected at random, and each husband and each wife were asked how much money they spent on their spouses Christmas present year. The responses were as follows:

Couple

1

2

3

4

5

6

7

Husband

25

21

38

64

52

16

26

Wife

16

42

56

41

19

26

24

1. Does the husband tend to spend more than the wife?

3

## Kingdom of Saudi Arabia Ministry of Education Saudi Electronic University ??????? ???????

Kingdom of Saudi Arabia

Ministry of Education

Saudi Electronic University

??????? ??????? ????????

????? ???????

??????? ???????? ???????????

College of Administrative and Financial Sciences

Assignment 2 MGT101 (1st Term 2021-2022)

Case Study

Course Name: Principles of Management

Student’s Name:

Course Code: MGT101

Student’s ID Number:

Semester: 1st

CRN:

Academic Year: 1442/1443 H, 1st Term

For Instructor’s Use only

Instructor’s Name: Abdulrahman I. Almanie

Level of Marks: High/Middle/Low

This assignment is an individual assignment.

Due date for Assignment 2 is by the end of Week 11.(20/11/2020)

The Assignment must be submitted only in WORD format via allocated folder.

Assignments submitted through email will not be accepted.

Students are advised to make their work clear and well presented, marks may be reduced for poor presentation. This includes filling your information on the cover page.

Students must mention question number clearly in their answer.

Late submission will NOT be accepted.

Avoid plagiarism, the work should be in your own words, copying from students or other resources without proper referencing will result in ZERO marks. No exceptions.

All answeres must be typed using Times New Roman (size 12, double-spaced) font. No pictures containing text will be accepted and will be considered plagiarism).

Submissions without this cover page will NOT be accepted.

Assignment Purposes/Learning Outcomes:

After completion of Assignment-2 students will able to understand the

1. Examine management issues and practices in motivation; organizational culture, structure, and behavior; team dynamics; and communication.

2. Relate motivational theories to motivating and demotivating factors.
3. Know and discuss manager’s role in motivating employees.

Assignment-2

Case Study

In September 2018, Mohammed Salim joined KAAF Software Solutions (KAFF) as a Senior Programmer, with a handsome pay. Prior to this job, he worked successfully as an Assistant Programmer in Gant Computers (Gant). Salim felt that working for KAFF, there are better career prospects, as it was growing much faster than Gant, which was a relatively small company.

Although Salim had enjoyed working there (at Gant), he realized that to grow further in his field, he would have to join a bigger company, and preferable one that handled international projects. He was sure he would excel in his position at KAFF, just as he had done in his old job at Gant.

KAFF had international operations and there was more than a slim chance that he would be sent to USA or the UK on a project. Knowing that this would give him a lot of exposure, besides looking good on his resume, Salim was quite excited about his new job.

Salim joined Mrs. Zeenat’s five-member team at KAFF. He had met Mrs. Zeenat during the orientation sessions, and was looking forward to working under her. His team members seemed warm and friendly, and comfortable with their work. He introduced himself to the team members and got to know more about each of them.

Wanting to know more about his boss, he casually asked one of the team members, about Mrs Zeenat. He was told that Mrs. Zeenat does not interfere with our work. Salim was surprised to know this and thought that probably Mrs. Zeenat was leaving them alone to do their work without any guidance, in order to allow them to realize their full potential.

At Gant, Salim had worked under Abdulrahman and had looked up to him as a guide and mentor – always guiding, but never interfering. Abdulrahman had let Salim make his own mistakes and learn from them. He had always encouraged individual ideas, and let the team discover the flaws, if any, through discussion and experience. He rarely held an individual member of his team responsible if the team as a whole failed to deliver – for him the responsibility for any failure was collective. Salim remembered telling his colleagues at Gant that the ideal boss would be someone who did not interfere with his/her subordinate’s work. Salim wanted to believe that Mrs. Zeenat too was the non-interfering type. If that was the case, surely her non-interference would only help him to grow.

In his first week at work, Salim found the atmosphere at the office a bit dull. However, he was quite excited. His team had been assigned a new project and was facing a few glitches with the new software. He had thought about the problem till late in the night and had come up with several possible solutions. He could not wait to discuss them with his team and Mrs. Zeenat. He smiled to himself when he thought of how Mrs. Zeenat would react when he will tell her that he had come up with several possible solutions to the problem. He was sure she would be happy with his having put in so much effort into the project, right from day one.

He was daydreaming about all the praise that he was going to get when Mrs. Zeenat walked into the office. Salim waited for her to go into her cabin, and after five minutes, called her up, asking to see her. She asked him to come in after tem minutes. When he went in, she looked at him blankly and asked, “Yes?” Not sure whether she had recognized him, Salim introduced himself. She said, “Ok, but why did you want to meet me?” He started to tell her about the problems they were having with the software. But before he could even finish, she told him that she was busy with other things, and that she would send an email with the solution to all the members of the team by the end of the day, and that they could then implement it immediately. Salim was somewhat taken aback. However, ever the optimist, he thought that she had perhaps already discussed the matter with the team.

Salim came out of Mrs. Zeenat’s cabin and went straight to where his team members sat. He thought it would still be nice to bounce ideas off them and also to see what solutions others might come up with. He told them of all the solutions he had in mind. He waited for the others to come up with their suggestions but not one of them spoke up. He was surprised, and asked them point-blank why they were so disinterested.

Faisal, one of the team members, said, “What is the point in our discussing these things? Mrs. Zeenat is not going to have time to listen to us on discuss anything. She will just give us the

solution she thinks is best, and we will just do what she tells us to do; why waste everyone’s time?”

Salim felt his heart sink. Was this the way things worked over here? However, he refused to lose heart and thought that maybe, he could change things a little. But as the days went by, Salim realized that Mrs. Zeenat was the complete opposite of his old boss.

While she was efficient at what she did and extremely intelligent, she had neither the time nor the inclination to groom her subordinates. Her solutions to problem were always correct, but she was not willing to discuss or debate the merits of any other ideas that her team might have. She did not hold the team down to their deadlines not did she ever interfere. In fact, she rarely said anything at all. If work did not get finished on time, she would just blame her team, and totally disassociate herself from them.

Time and again, Salim found himself thinking of Abdulrahman his old boss, and of how he had been such a positive influence. Mrs. Zeenat, on the other hand, even without actively doing anything, had managed to significantly lower his motivation levels.

Salim gradually began to lose interest in his work – it had become too mechanical for his taste. He didn’t really need to think; his boss had all the answers. He was learning nothing new, and he felt his career was going nowhere. As he became more and more discouraged, his performance suffered. From being someone with immense promise and potential Salim was now in danger of becoming just another mediocre techie.

Questions:

Q1. What, according to you, were the reasons for Salim’s disillusionment? Answer the question using Maslow’s Hierarchy of Needs. (2.5 marks)

Q2. What should Salim do to resolve his situation? (1.25 marks)

Q3. What should a team leader do, to ensure high levels of motivation among his/her team members? (1.25 Marks)

Page 1 of 4

## Kingdom of Saudi Arabia Ministry of Education Saudi Electronic University ??????? ???????

Writing Assignment Help Kingdom of Saudi Arabia

Ministry of Education

Saudi Electronic University

??????? ??????? ????????

????? ???????

??????? ???????? ???????????

College of Administrative and Financial Sciences

Assignment 2 MGT101 (1st Term 2021-2022)

Case Study

Course Name: Principles of Management

Student’s Name:

Course Code: MGT101

Student’s ID Number:

Semester: 1st

CRN:

Academic Year: 1442/1443 H, 1st Term

For Instructor’s Use only

Instructor’s Name: Abdulrahman I. Almanie

Level of Marks: High/Middle/Low

This assignment is an individual assignment.

Due date for Assignment 2 is by the end of Week 11.(20/11/2020)

The Assignment must be submitted only in WORD format via allocated folder.

Assignments submitted through email will not be accepted.

Students are advised to make their work clear and well presented, marks may be reduced for poor presentation. This includes filling your information on the cover page.

Students must mention question number clearly in their answer.

Late submission will NOT be accepted.

Avoid plagiarism, the work should be in your own words, copying from students or other resources without proper referencing will result in ZERO marks. No exceptions.

All answeres must be typed using Times New Roman (size 12, double-spaced) font. No pictures containing text will be accepted and will be considered plagiarism).

Submissions without this cover page will NOT be accepted.

Assignment Purposes/Learning Outcomes:

After completion of Assignment-2 students will able to understand the

1. Examine management issues and practices in motivation; organizational culture, structure, and behavior; team dynamics; and communication.

2. Relate motivational theories to motivating and demotivating factors.
3. Know and discuss manager’s role in motivating employees.

Assignment-2

Case Study

In September 2018, Mohammed Salim joined KAAF Software Solutions (KAFF) as a Senior Programmer, with a handsome pay. Prior to this job, he worked successfully as an Assistant Programmer in Gant Computers (Gant). Salim felt that working for KAFF, there are better career prospects, as it was growing much faster than Gant, which was a relatively small company.

Although Salim had enjoyed working there (at Gant), he realized that to grow further in his field, he would have to join a bigger company, and preferable one that handled international projects. He was sure he would excel in his position at KAFF, just as he had done in his old job at Gant.

KAFF had international operations and there was more than a slim chance that he would be sent to USA or the UK on a project. Knowing that this would give him a lot of exposure, besides looking good on his resume, Salim was quite excited about his new job.

Salim joined Mrs. Zeenat’s five-member team at KAFF. He had met Mrs. Zeenat during the orientation sessions, and was looking forward to working under her. His team members seemed warm and friendly, and comfortable with their work. He introduced himself to the team members and got to know more about each of them.

Wanting to know more about his boss, he casually asked one of the team members, about Mrs Zeenat. He was told that Mrs. Zeenat does not interfere with our work. Salim was surprised to know this and thought that probably Mrs. Zeenat was leaving them alone to do their work without any guidance, in order to allow them to realize their full potential.

At Gant, Salim had worked under Abdulrahman and had looked up to him as a guide and mentor – always guiding, but never interfering. Abdulrahman had let Salim make his own mistakes and learn from them. He had always encouraged individual ideas, and let the team discover the flaws, if any, through discussion and experience. He rarely held an individual member of his team responsible if the team as a whole failed to deliver – for him the responsibility for any failure was collective. Salim remembered telling his colleagues at Gant that the ideal boss would be someone who did not interfere with his/her subordinate’s work. Salim wanted to believe that Mrs. Zeenat too was the non-interfering type. If that was the case, surely her non-interference would only help him to grow.

In his first week at work, Salim found the atmosphere at the office a bit dull. However, he was quite excited. His team had been assigned a new project and was facing a few glitches with the new software. He had thought about the problem till late in the night and had come up with several possible solutions. He could not wait to discuss them with his team and Mrs. Zeenat. He smiled to himself when he thought of how Mrs. Zeenat would react when he will tell her that he had come up with several possible solutions to the problem. He was sure she would be happy with his having put in so much effort into the project, right from day one.

He was daydreaming about all the praise that he was going to get when Mrs. Zeenat walked into the office. Salim waited for her to go into her cabin, and after five minutes, called her up, asking to see her. She asked him to come in after tem minutes. When he went in, she looked at him blankly and asked, “Yes?” Not sure whether she had recognized him, Salim introduced himself. She said, “Ok, but why did you want to meet me?” He started to tell her about the problems they were having with the software. But before he could even finish, she told him that she was busy with other things, and that she would send an email with the solution to all the members of the team by the end of the day, and that they could then implement it immediately. Salim was somewhat taken aback. However, ever the optimist, he thought that she had perhaps already discussed the matter with the team.

Salim came out of Mrs. Zeenat’s cabin and went straight to where his team members sat. He thought it would still be nice to bounce ideas off them and also to see what solutions others might come up with. He told them of all the solutions he had in mind. He waited for the others to come up with their suggestions but not one of them spoke up. He was surprised, and asked them point-blank why they were so disinterested.

Faisal, one of the team members, said, “What is the point in our discussing these things? Mrs. Zeenat is not going to have time to listen to us on discuss anything. She will just give us the

solution she thinks is best, and we will just do what she tells us to do; why waste everyone’s time?”

Salim felt his heart sink. Was this the way things worked over here? However, he refused to lose heart and thought that maybe, he could change things a little. But as the days went by, Salim realized that Mrs. Zeenat was the complete opposite of his old boss.

While she was efficient at what she did and extremely intelligent, she had neither the time nor the inclination to groom her subordinates. Her solutions to problem were always correct, but she was not willing to discuss or debate the merits of any other ideas that her team might have. She did not hold the team down to their deadlines not did she ever interfere. In fact, she rarely said anything at all. If work did not get finished on time, she would just blame her team, and totally disassociate herself from them.

Time and again, Salim found himself thinking of Abdulrahman his old boss, and of how he had been such a positive influence. Mrs. Zeenat, on the other hand, even without actively doing anything, had managed to significantly lower his motivation levels.

Salim gradually began to lose interest in his work – it had become too mechanical for his taste. He didn’t really need to think; his boss had all the answers. He was learning nothing new, and he felt his career was going nowhere. As he became more and more discouraged, his performance suffered. From being someone with immense promise and potential Salim was now in danger of becoming just another mediocre techie.

Questions:

Q1. What, according to you, were the reasons for Salim’s disillusionment? Answer the question using Maslow’s Hierarchy of Needs. (2.5 marks)

Q2. What should Salim do to resolve his situation? (1.25 marks)

Q3. What should a team leader do, to ensure high levels of motivation among his/her team members? (1.25 Marks)

Page 1 of 4

## Assignment 4 STA6507 – Nonparametric Statistics Fall 2021 Due at 11:59 pm

Assignment 4

STA6507 – Nonparametric Statistics

Fall 2021

Due at 11:59 pm on November 18, 2020

In this assignment we will practice using tests for contingency tables and rank-based tests; submit your code R with your solutions (R Markdown is preferred). Solve all problems but only two will be graded. Put those that you want me to grade at the beginning of your solution.

Problem 1

One hundred men and 100 women were asked to try a new toothpaste and to state whether they liked or did not like the new taste. 32 men and 26 women said they did not like the new taste. Does this indicate a difference in preferences between men and women in general?

Problem 2

A quick test for correlation between two variables X and Y, each of which has at least an ordinal scale of measurement, can be performed using the Fishers exact test. The procedure is as follows:

Divide the scatter plot of the N values of (X,Y) with a vertical line at the median of X.

Divide the scatter plot of the N values of (X,Y) with a horizontal line at the median of Y. Count the number of observations in each of the four quadrants. Note that the row and

column totals are N/2, and are not random.

Suppose that 16 observations pairs of X = age of marriage of a husband, and Y=age of marriage of his father, resulted on 7 pairs where both ages were above the median. Are the two variables positively correlated?

Problem 3

A random sample of stocks from the American Stock Exchange (ASE) is compared with a random sample of stocks from the New York Stock Exchange to see if any difference in the rating percent-ages of the two exchanges. Of the 23 stocks from the ASE there were 11 As, 11 Bs, and 1 C. Of the 35 stocks from the NYSE there were 24 As, 11 Bs, and no Cs.

What does your analysis look like?

1

Problem 4

A television-marketing rm would like to determine if the time of the ad appeared in television is related to the product being sold. The number of responses to the products rm is as follows:

Product

Fishing Rod

Kitchen Tool

Music CD

Exercise Machine

Daytime

6

73

55

7

Nighttime

14

65

82

8

Weekend

21

58

48

8

What does your analysis look like?

Calculate and comment the Cramer’s Contingency Coefficient.

Problem 5

Test the hypothesis that the following samples were obtained from populations having the same medians.

Sample1: 35, 42, 42, 30, 15, 31, 29, 29, 17

Sample2: 34, 38, 26, 17, 42, 28, 35, 33, 16

Sample3: 17, 29, 30, 36, 41, 30, 31, 23, 38

Problem 6

Random samples from each of three different types of light bulbs were tested to see how long the light bulbs lasted, with the following results:

A

73

64

67

62

B

84

80

81

77

C

82

79

71

75

Do these results indicate a significant difference between brands?

Problem 7

A blood bank kept a record of the rate of heartbeats for several blood donors.

Men

58

65

74

74

76

79

82

86

Women

66

68

67

69

72

73

74

75

76

1. Is the average of the rate of heartbeats the same for men and women?

2

Problem 8

7 married couples were selected at random, and each husband and each wife were asked how much money they spent on their spouses Christmas present year. The responses were as follows:

Couple

1

2

3

4

5

6

7

Husband

25

21

38

64

52

16

26

Wife

16

42

56

41

19

26

24

1. Does the husband tend to spend more than the wife?

3

## Assignment 4 STA6507 – Nonparametric Statistics Fall 2021 Due at 11:59 pm

Assignment 4

STA6507 – Nonparametric Statistics

Fall 2021

Due at 11:59 pm on November 18, 2020

In this assignment we will practice using tests for contingency tables and rank-based tests; submit your code R with your solutions (R Markdown is preferred). Solve all problems but only two will be graded. Put those that you want me to grade at the beginning of your solution.

Problem 1

One hundred men and 100 women were asked to try a new toothpaste and to state whether they liked or did not like the new taste. 32 men and 26 women said they did not like the new taste. Does this indicate a difference in preferences between men and women in general?

Problem 2

A quick test for correlation between two variables X and Y, each of which has at least an ordinal scale of measurement, can be performed using the Fishers exact test. The procedure is as follows:

Divide the scatter plot of the N values of (X,Y) with a vertical line at the median of X.

Divide the scatter plot of the N values of (X,Y) with a horizontal line at the median of Y. Count the number of observations in each of the four quadrants. Note that the row and

column totals are N/2, and are not random.

Suppose that 16 observations pairs of X = age of marriage of a husband, and Y=age of marriage of his father, resulted on 7 pairs where both ages were above the median. Are the two variables positively correlated?

Problem 3

A random sample of stocks from the American Stock Exchange (ASE) is compared with a random sample of stocks from the New York Stock Exchange to see if any difference in the rating percent-ages of the two exchanges. Of the 23 stocks from the ASE there were 11 As, 11 Bs, and 1 C. Of the 35 stocks from the NYSE there were 24 As, 11 Bs, and no Cs.

What does your analysis look like?

1

Problem 4

A television-marketing rm would like to determine if the time of the ad appeared in television is related to the product being sold. The number of responses to the products rm is as follows:

Product

Fishing Rod

Kitchen Tool

Music CD

Exercise Machine

Daytime

6

73

55

7

Nighttime

14

65

82

8

Weekend

21

58

48

8

What does your analysis look like?

Calculate and comment the Cramer’s Contingency Coefficient.

Problem 5

Test the hypothesis that the following samples were obtained from populations having the same medians.

Sample1: 35, 42, 42, 30, 15, 31, 29, 29, 17

Sample2: 34, 38, 26, 17, 42, 28, 35, 33, 16

Sample3: 17, 29, 30, 36, 41, 30, 31, 23, 38

Problem 6

Random samples from each of three different types of light bulbs were tested to see how long the light bulbs lasted, with the following results:

A

73

64

67

62

B

84

80

81

77

C

82

79

71

75

Do these results indicate a significant difference between brands?

Problem 7

A blood bank kept a record of the rate of heartbeats for several blood donors.

Men

58

65

74

74

76

79

82

86

Women

66

68

67

69

72

73

74

75

76

1. Is the average of the rate of heartbeats the same for men and women?

2

Problem 8

7 married couples were selected at random, and each husband and each wife were asked how much money they spent on their spouses Christmas present year. The responses were as follows:

Couple

1

2

3

4

5

6

7

Husband

25

21

38

64

52

16

26

Wife

16

42

56

41

19

26

24

1. Does the husband tend to spend more than the wife?

3