QUESTION 1 (a) Table 1.1 shows the amount of money spent on mobile data plan by a sample of BA students at the beginning of a new semester. Expenditure on mobile data plan ($) Number of Students 0 to less than 20 23 20 to less than 40 55 40 to less than 60 109 60 to less than 80 86 80 to less than 100 27 100 to less than 120 10 Table 1.1 Calculate the expenditure on mobile data plan for the following: (i) Arithmetic mean ($54.45) (ii) Median ($54.13) (iii) Mode ($54.03) (iv) Standard deviation ($23.20) (b) Table 1.2 shows the Microsoft Excel output based on the starting salaries of last year graduates with Diploma in Early Childhood Education from the various polytechnics. Summary Statistics Count: 350 ($) Mean: 2, 150 Median: 2,000 Mode: 1,800 Range: 250 Sample Variance: 40,000 Table 1.2 (i) With the help of a diagram, comment on the starting salaries of the graduates with a Diploma Early Childhood Education. (ii) Compute the coefficient of variation for the starting salaries. (9.30%) (c) Discuss TWO situations, with examples, where it would be more appropriate to use relative dispersion to compare two or more sets of data