8. Find the median of the following data set (that is, the middle score). 2,2, 3, 4, 4, 4, 4, 4, 5, 5,6,7,7,7,8,8,9 9. Find the mean of the scores in the following frequency distribution. Remember the f column indicates the number of times each score occurred in the original data set. 10. " . What is the range of the following data? 11. A group of 10 students participated in a study of nutritional awareness. What is the sample variance of their scores? 20, 19, 22, 20, 15, 18, 15, 21, 19, 20 12 13. A group of 10 students participated in a study of nutritional awareness. What is the sample standard deviation of their scores? Their scores follow: 20, 19, 22, 20, 15, 18, 15, 21, 19, 20 Alicia scored a 70 on her psychology quiz, but the class as a whole averaged a 40. If the standard deviation was 10, what was Alicia's z-score?