The times in minutes) taken by a sample of nine customers to complete a transaction are 19, 32, 27. 37, 13, 23, 32, 26, and 16. Find the standard deviation of the time 8 35 10 12 QUESTION 8 What is the mean of the following data set? 4.8. 11. 12. 13 270 E 9.6 11.0 14.4 QUESTION 9 What is the median of the following set of values? 5. 19, 17, 13, 17. 12. 13. 17 11 15 13 17 QUESTION 10 sampling is used when the population is large and it includes subjects residing over a large geographic area. Random Systematic Stratified Cluster