Find the indicated probability. Give your answer as a simplified fraction. The o

Question

Find the indicated probability. Give your answer as a simplified fraction. The overnight shipping business has skyrocketed in the last ten years. The single greatest predictor of a company's success has been proven time and again to be customer service. A study was conducted to study the customer satisfaction levels for one overnight shipping business. In addition to the customer's satisfaction level the customers were asked how often they used overnight shipping. The results are shown below in the following table. A customer is chosen at random. Given that the customer uses the company two to five times per month, what is the probability that they expressed high satisfaction with the company? Satisfaction level Frequency of Use High Medium Low TOTAL 2 per month | 250 140 10 400 200 100 700 2-5 per month 140 70 25 220 > 5 per month TOTAL 460 20

Explanation / Answer

P(high satisfaction with company | customer uses the company 2-5 times per month) = P(customer has high satisfaction and uses company 2-5 times per month) / P(customer uses company 2-5 times per month)

= (140/700) / (200/700)

= 140/200

= 0.7

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