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QUESTION FIVE a) The daily sales (ZMK) of an airtime vendor over 30 randomly selected days are: 17 22 30 25 16 10 34 26 19 11 24 31 29 20 20 17 28 11 15 21 30 25 18 10 34 15 17 28 21 14 i. ii. Present the above data on a stem and leaf Elucidate the merits of presenting data on a stem and leaf over a frequency distribution. iii. iv. b) Let Z-N (0, 1). Find Compute the mean daily sales Hence, find the standard deviation of the daily sales. ii. i. P(Z≤3.10) ii. P(Z >-0.27) iii. P(-1.45 ≤ Z≤2.63) c) Two in 10 marketing strategies randomly sampled are known to be ineffective in a banking sector. »> i. Calculate the probability that in a sample of 6 marketing strategies employed in the banking sector: a.None are ineffective b. More than half are ineffective Find the: a. Expected number of ineffective strategies, and b.Standard deviation of ineffective strategies used in the banking sector. END OF QUIZ ONE