Statistics -Topic 7 & One project

Chapter 19: 19.9, 19.10, 19.13, 19.14, and 19.16

Chapter 20: 20.5, 20.6, 20.7, and 20.10

Don't use plagiarized sources. Get Your Custom Essay on
Statistics -Topic 7 & One project
Just from $13/Page
Order Essay

Topic 7 – MANOVA Project

Directions: Use the following information to complete the assignment. While APA format is not required for the body of this assignment, solid academic writing is expected, and documentation of sources should be presented using APA formatting guidelines, which can be found in the APA Style Guide, located in the Student Success Center.

A researcher randomly assigns 33 subjects to one of three groups. Group 1 receives technical dietary information interactively from an on-line website. Group 2 receives the same information from a nurse practitioner, while Group 3 receives the information from a video tape made by the same nurse practitioner.

The researcher looked at three different ratings of the presentation; difficulty, usefulness, and importance to determine if there is a difference in the modes of presentation. In particular, the researcher is interested in whether the interactive website is superior because that is the most cost-effective way of delivering the information.

Group

Usefulness

Difficulty

Importance

1

20

5

18

1

25

9

8

1

23

15

20

1

16

9

22

1

20

6

22

1

28

14

8

1

20

6

13

1

25

8

13

1

24

10

24

1

18

10

20

1

17

9

4

2

28

7

14

2

25

14

5

2

26

9

20

2

19

15

22

2

29

14

12

2

15

6

2

2

29

10

5

2

26

11

1

2

22

5

2

2

15

15

14

2

29

6

4

2

15

6

3

3

22

8

12

3

27

9

14

3

21

10

7

3

17

9

1

3

16

7

12

3

19

9

7

3

23

10

1

3

27

9

5

3

23

9

6

3

16

14

22

1. Run the appropriate analysis of the data and interpret the results.

2. How could this study have been done differently? Why or why not would this approach be better?

PSY5

20

– Module

7

A

nswer Sheet

Submit your answers in the boxes provided. No credit will be given for responses not found in the correct answer area.

C

hapter 19:

19.9 Randomly selected records of

1

40

convicted criminals reveal that their crimes were committed on the following days of the week:

D

AYS W

H

E

N CR

I

MES WERE COMMITTED

F

REQUENCY

MON.

TUE.

WED.

THU.

FRI.

SAT.

SUN.

TOTA

L

Observed (ƒₒ)

17

21

22

1

8

23

24

15

14

0

Question:

Calculations or Logic:

Answer:

Using the .01 level of significance, test the null hypothesis that in the underlying population, crimes are equally likely to be committed on any day of the week.

Step 1

What is the research problem?

Step 2

What is the null hypothesis?

What is the alternative hypothesis?

Step 3

What are the degrees of freedom?

What is the decision rule?

Step 4

What is the critical X2?

What is the value of X2? (you will need to calculate this)

Step 5

What is the decision? (retain or reject the null hypothesis at the specified level of significance; note the relationship between the observed and critical X2 scores)

Step 6

What is your interpretation of the decision in relation to the original research problem?

Specify the p -value for this test result.

How might this result be reported in the literature?

19.

10

While playing a coin-tossing game in which you are to guess whether heads or tails will appear, you observe

30

heads in a string of

50

coin tosses.

Question:

Calculations or Logic:

Answer:

Step

1

What is the research problem?

Step

2

What is the null hypothesis?

What is the alternative hypothesis?

Step 3

What are the degrees of freedom?

What is the decision rule?

Step

4

What is the critical X2?

What is the value of X2? (you will need to calculate this)

Step 5

What is the decision? (retain or reject the null hypothesis at the specified level of significance; note the relationship between the observed and critical X2 scores)

Step

6

What is your interpretation of the decision in relation to the original research problem?

Specify the p -value for this test result.

Test the null hypothesis that this coin is unbiased, that is, that heads and tails are equally likely to appear in the long run.

19.13 In 19

12

, over 800 passengers perished after the ocean liner Titanic collided with an iceberg and sank. The table below compares the survival frequencies of cabin and steerage passengers.

TOTAL

ACCOMMODATIONS ON THE TITANIC

SURVIVED

CA

B

IN

STEERA

G

E

TOTAL

YES

29

9

1

86

4

85

NO

28

0

52

6

806

5

79

71

2

12

91

Source: MacG. Dawson, R .

J

. (19

95

). The “unusual” episode data revisited. Journal of Statistical Education, 3, no. 3.

Question:

Calculations or Logic:

Answer:

Step 1

What is the research problem?

Step 2

What is the null hypothesis?

What is the alternative hypothesis?

Step 3

What are the degrees of freedom?

What is the decision rule?

Step 4

What is the critical X2?

What is the value of X2? (you will need to calculate this)

Step 5

What is the decision? (retain or reject the null hypothesis at the specified level of significance; note the relationship between the observed and critical X2 scores)

Step 6

What is your interpretation of the decision in relation to the original research problem?

Using the .05 level of significance, test the null hypothesis that survival rates are independent of the passengers’ accommodations (cabin or steerage).

Assuming a significant x², estimate the strength of the relationship.

What is the strength of this relationship? (small, medium, large or very large)?

To more fully appreciate the importance of this relationship, calculate an odds ratio to determine how much more likely a cabin passenger is to have survived than a steerage passenger.

19.14 In a classic study, Milgram et al. “lost” stamped envelopes with fictitious addresses (

Medical Research Association

,

Personal Address

,

Friends of Communist Party

, and

Friends of Nazi Party

).* One hundred letters with each address were distributed among four locations (shops, cars, streets, and phone booths) in New Haven Connecticut, with the following results:

TOTAL

100

100

25

75

100

ADDRESS

RETURNED

NOT RETURNED

Medical Research Association

72

28

100

Personal Address 71 2

9

Friends of Communist Party

25

75

Friends of Nazi Party

Total

1

93

207

400

*Milgram, S., Mann, L., & Harter, L. (1965). The Lost Letter Technique: A Tool of

Social Research. Public Opinion Quarterly, 29,

43

7–438.

Question:

Calculations or Logic:

Answer:

Step 1

What is the research problem?

Step 2

What is the null hypothesis?

What is the alternative hypothesis?

Step 3

What are the degrees of freedom?

What is the decision rule?

Step 4

What is the critical X2?

What is the value of X2? (you will need to calculate this)

Step 5

What is the decision? (retain or reject the null hypothesis at the specified level of significance; note the relationship between the observed and critical X2 scores)

Step 6

What is your interpretation of the decision in relation to the original research problem?

Assuming a significant x², estimate the strength of the relationship.

What is the strength of this relationship? (small, medium, large or very large)?

Using the .05 level of significance, test the null hypothesis that address does not matter in the underlying population.

Specify the approximate p -value for this result.

How might these results be reported in the literature?

Collapse the original 4 x 2 table to a 2 x 2 table by combining the results for the two neutral addresses and for the two inflammatory addresses. Calculate the odds ratio for returned letters.

19.16 A social scientist cross-classifies the responses of 100 randomly selected people on the basis of gender and whether or not they favor strong gun control laws to obtain the following:

TOTAL

40

TOTAL

30

100

GENDER AND ATTITUDE TOWARD STRONG GUN CONTROL

ATTITUDE TOWARD GUN CONTROL

GENDER

FAVOR

OPPOSE

MALE

40 20

60

FEMALE

30

10

70

Question:

Calculations or Logic:

Answer:

Step 1

What is the research problem?

Step 2

What is the null hypothesis?

What is the alternative hypothesis?

Step 3

What are the degrees of freedom?

What is the decision rule?

Step 4

What is the critical X2?

What is the value of X2? (you will need to calculate this)

Step 5

What is the decision? (retain or reject the null hypothesis at the specified level of significance; note the relationship between the observed and critical X2 scores)

Step 6

What is your interpretation of the decision in relation to the original research problem?

Specify the approximate p -value for this result.

How might these results be reported in the literature?

Using the .05 level of significance, test the null hypothesis for gender and attitude toward gun control.

Chapter 20:

20.5 A group of high-risk automobile drivers (with three moving violations in one year) are required, according to random assignment, either to attend a traffic school or to perform supervised volunteer work. During the subsequent five-year period, these same drivers were cited for the following number of moving violations:

NUMBER OF MOVING VIOLATIONS

TRAFFIC SCHOOL

VOLUNTEER WOR

K

0
0

15

9
7
0
2

23

7
8

26

7
4
1
1

14

6
10

 

Question:

Calculations or Logic:

Answer:

Step 1

What is the research problem?

Step 2

What is the null hypothesis?

What is the alternative hypothesis?

Step 3

Group 1:

Group 2:

What is the decision rule?

Step 4

Step 5

Step 6

What is your interpretation of the decision in relation to the original research problem?

Specify the approximate p -value for this result.

Why might the Mann-Whitney U test be preferred to the t test for these data?

Use U to test the null hypothesis at the .05 level of significance.

What is the sample size?

Group 1:

Group 2:

What is the sum of ranks?

What is the critical U?

What is the value of U? (you will need to calculate this)

U1:

U2:

U:

What is the decision? (retain or reject the null hypothesis)

20.6 A social psychologist wishes to test the assertion that our attitude toward other people tends to reflect our perception of their attitude toward us. A randomly selected member of each of 12 couples who live together is told (in private) that his or her partner has rated that person at the high end of a 0 to 100 scale of trustworthiness. The other member is told (also in private) that this or her partner has rated that person at the low end of the trustworthiness scale. Each person is then asked to estimate, in turn, the trustworthiness of his or her partner, yielding the following results. (According to the original assertion, the people in the trustworthy condition should give higher ratings than should their partners in the untrustworthy condition.)

75

60

30

20

22

63

72

TRUSTWORTHINESS RATINGS

COUPLE

TRUSTWORTHY (1)

UNTRUSTWORTHY (2)

A
B

35

C 50

55

D 93
E

74

12
F

47

34

G 95
H

63

I

44

43
J

88

79
K

56

33

L 86

Question:

Calculations or Logic:

Answer:

Step 1

What is the research problem?

Step 2

What is the null hypothesis?

What is the alternative hypothesis?

Step 3

What is the decision rule?

Step 4

Step 5

What is the decision? (retain or reject the null hypothesis)

Step 6

What is your interpretation of the decision in relation to the original research problem?

Specify the approximate p -value for this result.

Use T to test the null hypothesis at the .01 level.

What is n?

What is the critical T?

What is the value of T? (you will need to calculate this)

R+:

R-:

T:

20.7 Does background music influence the scores of college students on a reading comprehension test? Sets of 10 randomly selected students take a reading comprehension test with rock, country, or classical music in the background. The results are as follows (higher scores reflect better comprehension):

75

95

23

94

72

93

79

90

28

94

100

READING COMPREHENSION SCORES

ROCK (1)

COUNTRY (2)

CLASSICAL (3)

90

99

52

11

94

82

91

67

98

97

81

31

73

83

85

87

84

77

69

Question:

Calculations or Logic:

Answer:

Step 1

What is the research problem?

Step 2

What is the null hypothesis?

What is the alternative hypothesis?

Step 3

What are the degrees of freedom?

What is the decision rule?

Step 4

Step 5

What is the decision? (retain or reject the null hypothesis)

Step 6

What is your interpretation of the decision in relation to the original research problem?

Specify the approximate p -value for this result.

Why might the H test be preferred to the F test for these data?

Use H to test the null hypothesis at the .05 level of significance.

What is the critical H?

What is the value of H? (you will need to calculate this)

20.10 Use H rather than F to test the weight change data recorded in Review Question 16.13 on page 381.

Question:

Calculations or Logic:

Answer:

Step 1

What is the research problem?

Step 2

What is the null hypothesis?

What is the alternative hypothesis?

Step 3

What are the degrees of freedom?

What is the decision rule?

Step 4

What is the critical H?

What is the value of H? (you will need to calculate this)

Step 5

What is the decision? (retain or reject the null hypothesis)

Step 6

What is your interpretation of the decision in relation to the original research problem?

Use H rather than F to test the weight change data.

What Will You Get?

We provide professional writing services to help you score straight A’s by submitting custom written assignments that mirror your guidelines.

Premium Quality

Get result-oriented writing and never worry about grades anymore. We follow the highest quality standards to make sure that you get perfect assignments.

Experienced Writers

Our writers have experience in dealing with papers of every educational level. You can surely rely on the expertise of our qualified professionals.

On-Time Delivery

Your deadline is our threshold for success and we take it very seriously. We make sure you receive your papers before your predefined time.

24/7 Customer Support

Someone from our customer support team is always here to respond to your questions. So, hit us up if you have got any ambiguity or concern.

Complete Confidentiality

Sit back and relax while we help you out with writing your papers. We have an ultimate policy for keeping your personal and order-related details a secret.

Authentic Sources

We assure you that your document will be thoroughly checked for plagiarism and grammatical errors as we use highly authentic and licit sources.

Moneyback Guarantee

Still reluctant about placing an order? Our 100% Moneyback Guarantee backs you up on rare occasions where you aren’t satisfied with the writing.

Order Tracking

You don’t have to wait for an update for hours; you can track the progress of your order any time you want. We share the status after each step.

image

Areas of Expertise

Although you can leverage our expertise for any writing task, we have a knack for creating flawless papers for the following document types.

Areas of Expertise

Although you can leverage our expertise for any writing task, we have a knack for creating flawless papers for the following document types.

image

Trusted Partner of 9650+ Students for Writing

From brainstorming your paper's outline to perfecting its grammar, we perform every step carefully to make your paper worthy of A grade.

Preferred Writer

Hire your preferred writer anytime. Simply specify if you want your preferred expert to write your paper and we’ll make that happen.

Grammar Check Report

Get an elaborate and authentic grammar check report with your work to have the grammar goodness sealed in your document.

One Page Summary

You can purchase this feature if you want our writers to sum up your paper in the form of a concise and well-articulated summary.

Plagiarism Report

You don’t have to worry about plagiarism anymore. Get a plagiarism report to certify the uniqueness of your work.

Free Features $66FREE

  • Most Qualified Writer $10FREE
  • Plagiarism Scan Report $10FREE
  • Unlimited Revisions $08FREE
  • Paper Formatting $05FREE
  • Cover Page $05FREE
  • Referencing & Bibliography $10FREE
  • Dedicated User Area $08FREE
  • 24/7 Order Tracking $05FREE
  • Periodic Email Alerts $05FREE
image

Our Services

Join us for the best experience while seeking writing assistance in your college life. A good grade is all you need to boost up your academic excellence and we are all about it.

  • On-time Delivery
  • 24/7 Order Tracking
  • Access to Authentic Sources
Academic Writing

We create perfect papers according to the guidelines.

Professional Editing

We seamlessly edit out errors from your papers.

Thorough Proofreading

We thoroughly read your final draft to identify errors.

image

Delegate Your Challenging Writing Tasks to Experienced Professionals

Work with ultimate peace of mind because we ensure that your academic work is our responsibility and your grades are a top concern for us!

Check Out Our Sample Work

Dedication. Quality. Commitment. Punctuality

Categories
All samples
Essay (any type)
Essay (any type)
The Value of a Nursing Degree
Undergrad. (yrs 3-4)
Nursing
2
View this sample

It May Not Be Much, but It’s Honest Work!

Here is what we have achieved so far. These numbers are evidence that we go the extra mile to make your college journey successful.

0+

Happy Clients

0+

Words Written This Week

0+

Ongoing Orders

0%

Customer Satisfaction Rate
image

Process as Fine as Brewed Coffee

We have the most intuitive and minimalistic process so that you can easily place an order. Just follow a few steps to unlock success.

See How We Helped 9000+ Students Achieve Success

image

We Analyze Your Problem and Offer Customized Writing

We understand your guidelines first before delivering any writing service. You can discuss your writing needs and we will have them evaluated by our dedicated team.

  • Clear elicitation of your requirements.
  • Customized writing as per your needs.

We Mirror Your Guidelines to Deliver Quality Services

We write your papers in a standardized way. We complete your work in such a way that it turns out to be a perfect description of your guidelines.

  • Proactive analysis of your writing.
  • Active communication to understand requirements.
image
image

We Handle Your Writing Tasks to Ensure Excellent Grades

We promise you excellent grades and academic excellence that you always longed for. Our writers stay in touch with you via email.

  • Thorough research and analysis for every order.
  • Deliverance of reliable writing service to improve your grades.
Place an Order Start Chat Now
image

Order your essay today and save 30% with the discount code Happy