QUESTION 8 2 points Save Answer A salesman attempts to make 13 sales in 1 day and assume that he has a probability of 0.19 of making each sale. Let S = the number of sales made and assume S ~ Bin(13, 0.19) For each sale the salesman makes, he earns a $200 bonus. Let T be the total bonus ie T = 200S Calculate O_correct to 2dp (remember standard deviation, not variance). QUESTION 9 2 points Save Answer A person works on a help line for a company. They spend most of their time on the phone but in any hour of work there may be time spent not on the phone, eg making notes, attending to email etc. Let X = the number of phone calls that the person takes in 1 hour and assume X ~ Poi(6). Furthermore let Y = time taken to deal with a call (in mins) and assume Y ~ N(8,2.52) Based on the above information, what is the average amount of time spent on the phone in 1 hour of work? O a. 6 *8 = 48 minutes O b. impossible to calculate without more information O c. 6 * 8 + 1.96 * 2.5 = 52.9 minutes O d. 6 * 8 + 2.52 = 54.25 minutes