The breaking strengths of a random sample of 26 molded
Chapter 8, Problem 8.6.7(choose chapter or problem)
The breaking strengths of a random sample of 26 molded plastic housings were measured, and a sample mean of x =479.42 and a sample standard deviation of s =12.55 were obtained. A condence interval (472.56, 486.28) for the average strength of molded plastic housings was constructed from these results. What is the condence level of this condence interval?
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