Question 20 1.5 pts A sample of n = 10 measurements consists of the following values: 15, 12, 13, 16, 11, 12, 14, 15, 11, 13 a. Find the mean. Round your answer to one decimal place. b. Find the median. c. Based on the values in parts (a) and (b) above, are the measurements symmetric, skewed to the right, or skewed to the left? d. Find the standard deviation. Round your answer to two decimal places. e. Find the range