To determine the effect their salespeople have on purchases, a department store

Question

To determine the effect their salespeople have on purchases, a department store polled 700 shoppers regarding whether or not they made a purchase and whether or not they were pleased with the service they received. Of those who made a purchase, 141 were happy with the service and 143 were not. Of those who made no purchase, 201 were happy with the service and 215 were not. Use probability rules (when appropriate) to find the probability of the event stated. (Enter your answers as fractions.) (a) A shopper made a purchase. (b) A shopper did not make a purchase. Rubric: 3 points each. Part a): [Select ] Part b): [ Select ]

Explanation / Answer

a) P(a shopper made a purchase) = Number of people who made purchase/Total number of people surveyed

= (141+143)/700

= 284/700

= 0.4057

b) A shopper did not make a purchase = 1 - P(a shopper made a purchase)

= 1 - 0.4057

= 0.5943

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