Twelve samples of a metal alloy are tested. The exibility
Chapter 8, Problem 8.6.23(choose chapter or problem)
Twelve samples of a metal alloy are tested. The exibility measurements had a sample average of 732.9 and a sample standard deviation of 12.5. (a) Is there sufcient evidence to conclude that the exibility of this kind of metal alloy is smaller than 750? Use an appropriate hypothesis test to investigate this question. (b) Construct a 99% condence interval that provides an upper bound on the exibility of this kind of metal alloy.
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