# Refer to the measurement of job satisfaction in Example 4. Rather than average score, researchers often prefer

## Question:

(a) Find a 95% confidence interval for the difference of proportions p1 - p2.

(b) Perform the Z test for the null hypothesis H0: P1 = P2 versus H1: p1 > p2. Take α = .05.

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**Related Book For**

## Statistics Principles And Methods

**ISBN:** 9780470904114

7th Edition

**Authors:** Richard A. Johnson, Gouri K. Bhattacharyya