Corporate Perceptions Study 2011 surveyed readers and asked how each rate- reputation of the company for over 250 worldwide corporations. Both the quality of management and the reputation of the company were rated on an excellent, good, and fair categorical scale. Assume the sample data for 200 respondents below applies to this study. The Wall Streer Jou quality of management and the Reputation of Company Quality of Management Excellent Good Fair Excellent: 40 25 5 Good 35 28 10 Fair 25 17 15 (a) Use a 0.05 level of significance and test for independence of the quality of management and the reputation of the company. State the null and alternative hypotheses. O H,1 Quality of management is not independent of the reputation of the company. H, The proportion of companies with excellent management is not equal across companies with differing reputations. • H,1 Quality of management is independent of the reputation of the company. H Quality of management is not independent of the reputation of the company. O H,: Quality of management is independent of the reputation of the company. H The proportion of companies with excellent management is equal across companies with differing reputations. O H,: Quality of management is not independent of the reputation of the company. H,: Quality of management is independent of the reputation of the company. Find the value of the test statistic. (Round your answer to three decimal places.) Find the p-value. (Round your answer to four decimal places.) p-value= State your conclusion. O Do not reject H, We cannot conclude that the rating for the quality of management is independent of the rating of the reputation of the company. O Reject H,. We conclude that the rating for the quality of management is independent of the rating for the reputation of the company. O Reject H,. We conclude that the rating for the quality of management is not independent of the rating for the reputation of th сompany, O Do not reject H, We cannot conclude that the ratings for the quality of management and the reputation of the company are not independent. (b) If there is a dependence or association between the two ratings, discuss and use probabilities to justify your answer. For companies with an excellent reputation, the largest column probability corresponds to -Select--- V management quality. For companies with a good reputation, the largest column probability corresponds to -Select-V management quality. For companies with a fair reputation, the largest column probability corresponds to -Select- v management quality. Since these highest probabilities correspond to -Select-- v ratings of quality of management and reputation, the two ratings are -Select--

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.6: Summarizing Categorical Data
Problem 30PPS
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The Wall Street Journal Corporate Perceptions Study 2011 surveyed readers and asked how each rated the quality of management and the
reputation of the company for over 250 worldwide corporations. Both the quality of management and the reputation of the company were
rated on an excellent, good, and fair categorical scale. Assume the sample data for 200 respondents below applies to this study.
Reputation of Company
Quality of Management
Excellent Good Fair
Excellent
40
25
5
Good
35
28
10
Fair
25
17
15
(a) Use a 0.05 level of significance and test for independence of the quality of management and the reputation of the company.
State the null and alternative hypotheses.
O H,: Quality of management is not independent of the reputation of the company.
H,: The proportion of companies with excellent management is not equal across companies with differing reputations.
O H,: Quality of management is independent of the reputation of the company.
H: Quality of management is not independent of the reputation of the company.
O H,: Quality of management is independent of the reputation of the company.
H: The proportion of companies with excellent management is equal across companies with differing reputations.
O H,: Quality of management is not independent of the reputation of the company.
H: Quality of management is independent of the reputation of the company.
Find the value of the test statistic. (Round your answer to three decimal places.)
Find the p-value. (Round your answer to four decimal places.)
p-value =
State your conclusion.
O Do not reject H. We cannot conclude that the rating for the quality of management is independent of the rating of the
reputation of the company.
O Reject H. We conclude that the rating for the quality of management is independent of the rating for the reputation of the
сompany.
O Reject H. We conclude that the rating for the quality of management is not independent of the rating for the reputation of the
company.
O Do not reject H. We cannot conclude that the ratings for the quality of management and the reputation of the company are
not independent.
(b) If there is a dependence or association between the two ratings, discuss and use probabilities to justify your answer.
For companies with an excellent reputation, the largest column probability corresponds to --Select--v management quality. For
companies with a good reputation, the largest column probability corresponds to -Select- v management quality. For companies
with a fair reputation, the largest column probability corresponds to -Select- v management quality. Since these highest
probabilities corespond to -Select-- v ratings of quality of management and reputation, the two ratings are -Select-- V
Transcribed Image Text:The Wall Street Journal Corporate Perceptions Study 2011 surveyed readers and asked how each rated the quality of management and the reputation of the company for over 250 worldwide corporations. Both the quality of management and the reputation of the company were rated on an excellent, good, and fair categorical scale. Assume the sample data for 200 respondents below applies to this study. Reputation of Company Quality of Management Excellent Good Fair Excellent 40 25 5 Good 35 28 10 Fair 25 17 15 (a) Use a 0.05 level of significance and test for independence of the quality of management and the reputation of the company. State the null and alternative hypotheses. O H,: Quality of management is not independent of the reputation of the company. H,: The proportion of companies with excellent management is not equal across companies with differing reputations. O H,: Quality of management is independent of the reputation of the company. H: Quality of management is not independent of the reputation of the company. O H,: Quality of management is independent of the reputation of the company. H: The proportion of companies with excellent management is equal across companies with differing reputations. O H,: Quality of management is not independent of the reputation of the company. H: Quality of management is independent of the reputation of the company. Find the value of the test statistic. (Round your answer to three decimal places.) Find the p-value. (Round your answer to four decimal places.) p-value = State your conclusion. O Do not reject H. We cannot conclude that the rating for the quality of management is independent of the rating of the reputation of the company. O Reject H. We conclude that the rating for the quality of management is independent of the rating for the reputation of the сompany. O Reject H. We conclude that the rating for the quality of management is not independent of the rating for the reputation of the company. O Do not reject H. We cannot conclude that the ratings for the quality of management and the reputation of the company are not independent. (b) If there is a dependence or association between the two ratings, discuss and use probabilities to justify your answer. For companies with an excellent reputation, the largest column probability corresponds to --Select--v management quality. For companies with a good reputation, the largest column probability corresponds to -Select- v management quality. For companies with a fair reputation, the largest column probability corresponds to -Select- v management quality. Since these highest probabilities corespond to -Select-- v ratings of quality of management and reputation, the two ratings are -Select-- V
Expert Solution
Step 1

The data of quality management and the reputation of the company, rated on and excellent, good and fair scale is obtained as follows

Quality management

Excellent

Good

Fair

Total

Excellent

40

25

5

70

Good

35

28

10

73

Fair

25

17

15

57

Total

100

70

30

200

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