Suppose that in Exercise 8-14 we wanted the error in

Chapter 8, Problem 16E

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QUESTION:

Suppose that in Exercise 8-14 we wanted the error in estimating the mean life from the two-sided confidence interval to be five hours at 95% confidence. What sample size should be used?

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QUESTION:

Suppose that in Exercise 8-14 we wanted the error in estimating the mean life from the two-sided confidence interval to be five hours at 95% confidence. What sample size should be used?

ANSWER:

Step 1 of 2

Given,

Error in estimating the mean life, E = 5 Hrs

CI = 95%

From exercise 8.14, we have

The standard deviation,

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