To test the accuracy of a certain brand of radon detectors, 12 detectors were placed in a chamber that exposed them to a certain amount of radon. Based on the amount of radon the detectors have been exposed to, they should read 105. The average of the sample of detector readings was 94.967 with a standard deviation of 27.080. Using a = 0.10, can we reject the claim that the radon detectors are working properly? Perform a t-distribution rejection region hypothesis test for means. Show all seven steps.