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Get Full Access to Mathematical Statistics With Applications - 7 Edition - Chapter 10 - Problem 45e
Get Full Access to Mathematical Statistics With Applications - 7 Edition - Chapter 10 - Problem 45e

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# Refer to Exercise 10.21. Construct a 99% confidence

ISBN: 9780495110811 47

## Solution for problem 45E Chapter 10

Mathematical Statistics with Applications | 7th Edition

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Problem 45E

Problem 45E

Refer to Exercise 10.21. Construct a 99% confidence interval for the difference in mean shear strengths for the two soil types.

a Is the value μ1 − μ2 = 0 inside or outside this interval?

b Based on the interval, should the null hypothesis discussed in Exercise 10.21 be rejected? Why?

c How does the conclusion that you reached compare with your conclusion in Exercise 10.21?

Reference

Shear strength measurements derived from unconfined compression tests for two types of soils gave the results shown in the following table (measurements in tons per square foot). Do the soils appear to differ with respect to average shear strength, at the 1% significance level?

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