1. (a) Given that the mode of the set data below is 8. 7, x, 5, 6, 5, 8, 9, 8 Find the median and mean from this data. (8) (b)Given data below are the ages of 150 people who participated in the marathon. Age (year) 8-10 11-13 14-16 17-19 20-22 23-25 Frequency 13 17 20 41 36 23 Find the mean, median and mode from this data. (b)Consider two sets of data, A and B, representing the test scores of two groups of students. The measures of dispersion for each set are calculated as follows: Set A Set B Mean 75 80 Standard deviation 10 15 Comment on the dispersion by comparing the coefficient of variation for both data. (6) (c)A meteorologist collected rainfall data from two different cities, City A and City B for 12 months. The monthly rainfall measurements (in millimetres) for each city are as follows: City A 45 55 60 40 50 City B 35 42 38 48 40 48 52 58 43 55 47 50 55 50 45 36 52 44 58 Compare the mean and standard deviation for the monthly rainfall measurement for the two cities. 2. (a) Calculate the range of numbers set below: 51, 45, 53, 68, 80, 71, 68, 49