1. Here is the 95% confidence interval estimate of the proportion of female medical school students: 0.449 < p < 0.511. a. What is the best point estimate of the proportion of females in the population of medical school students. b. What is the margin of error used in the construction of the confidence interval? 2. Six human skulls from around 4000 B. C. were measured, and the lengths have a mean of 94.2 mm and a standard deviation Of 4.9 mm. a. If you want to construct a 95% confidence interval estimate of the mean length of all such skulls, what requirements must be satisfied? b. Assuming that the requirements are satisfied, find the critical value that would be used for constructing a 95% confidence interval estimate of .