Listed in the accompanying data table are student evaluation ratings of courses and professors, where a rating of 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 evaluations to construct a 95% condence interval estimate ofthe standard deviation of the population from which the sample was obtained. b. Repeat part [a] using the 93 professor evaluations. 0. Compare the results from part [a] and part {b}. E Click the icon to view the data table. a.D