Solution Found!
Suppose that in Exercise 8-15 it is desired to estimate
Chapter 8, Problem 18E(choose chapter or problem)
QUESTION:
Suppose that in Exercise 8-15 it is desired to estimate the compressive strength with an error that is less than 15 psi at 99% confidence. What sample size is required?
Questions & Answers
QUESTION:
Suppose that in Exercise 8-15 it is desired to estimate the compressive strength with an error that is less than 15 psi at 99% confidence. What sample size is required?
ANSWER:
Step 1 of 2
Given,
Error in estimating the mean life, E = 15 psi
CI = 99%
From exercise 8.15, we have
The standard deviation,
Sample size, n = 12.
The mean,