Listed in the company data table or student valuation readings of courses in professors were waiting at 5 is for excellent. Assume that each sample is a simple random sample obtained from a population with a normal distribution. A. Use the 93 course evaluation to construct a 99% confidence interval estimate of the Stina deviation of the population from which samples obtained. B. Repeat part A and use the 93 professor evaluations. C. Compare the results from part a and part B