1.Given the following data set of patient ages: 21, 45, 34, 25, 61, 45, 6, 12, 49, 58, 38, 41, 9: a. Calculate the simple mean. b. Calculate the standard deviation. c. Calculate the median. d. Is the median equal to the mean? Why or why not. 2.The following data were collected regarding the number of patients admitted to a local emergency room each day for 18 days (patients per day, PPD). 23,22,24,26,16,24,21,26,22,20,21,26,26,25,17,24,14,15 a. What is the mean number of patients seen each day? b. What is the standard deviation of the data set? c. Construct a histogram for the data set using 2 PPD as your class width and starting with 14 as your lowest class