Ga. at the 0.05 level of significance, is there evidence that the mean difference is different from 0.0 inches? b. after looking at the results using the upper critical value test, we see that there is not enough evidence to conclude that the mean difference is different from 0.0 inches. c. construct a 95% confidence interval estimate of the population mean. interpret this interval. d. compare the conclusions reached in (a) and (b). e. because n = 100,n = 100, do you have to be concerned about the normality assumption needed for the t test and t interval?