Instructions Submit vour answers to all questions in a Word document. Download the data sets and use Excel to solve the problems. Question 1. Thirty graduate students were asked how manv credit hours thev 1.vere taking in the cunent quarter. Download the available data a. Calculate the mean, median, standard deviation, variance, and range for this sample using Excel. Write a sentence explaining what each measure means. b. What is the standard error of the mean based on the data?l c. 'u'll'hat would be the best point estimate for the population credit hours? {\"Population" refers to all graduate students' credit hours in the universe.) d. What is the 95% condence interval for the means of credit hours?