In an experiment designed to measure the time necessary
Chapter 8, Problem 8.31(choose chapter or problem)
In an experiment designed to measure the time necessary for an inspectors eyes to become used to the reduced amount of light necessary for penetrant inspection, the sample average time for n 9 inspectors was 6.32 sec and the sample standard deviation was 1.65 sec. It has previously been assumed that the average adaptation time was at least 7 sec. Assuming adaptation time to be normally distributed, does the data contradict prior belief? Use the t test with .1.
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