In an experiment designed to measure the time necessary for an inspector’s 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 s and the sample standard deviation was 1.65 s. It has previously been assumed that the average adaptation time was at least 7s. Assuming adaptation time to be normally distributed, does the data contradict prior belief? Use the t test with α = .1.