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When testing (at the 5% level of significance) whether the proportions have changed, what is the critical value?

When testing (at the 5% level of significance) whether the proportions have changed, what is the critical value?

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section: Chapter Questions
Problem 8CR
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15) Prior to a set of compensation policy changes at a company 30% of the employees surveyed said that they liked their job very much, 48% said that they liked their job moderately, and the remaining employees said that they were dissatisfied with their job. Now, in a survey of 191 employees, 76 said they liked their job very much, 110 said that they liked their job moderately, and the remaining employees said that they were dissatisfied with their job. When testing (at the 5% level of significance) whether the proportions have changed, what is the critical value? *please round your answer to 3 decimal places*

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