Recent statistics suggest that 15% of those who visit a retail site on the World Wide Web make a purchase. A retailer wished to verify this claim. To do so, she selected a sample of 16 "hits" to her site and found that 4 had actually made a purchase. a. What is the likelihood of exactly four purchases? (Round your answer to 4 decimal places.)     b. How many purchases should she expect? (Round your answer to 1 decimal place.)     c. What is the likelihood that four or more "hits" result in a purchase? (Round your answer to 2 decimal places.)

Question

Recent statistics suggest that 15% of those who visit a retail site on the World Wide Web make a purchase. A retailer wished to verify this claim. To do so, she selected a sample of 16 "hits" to her site and found that 4 had actually made a purchase.

a. What is the likelihood of exactly four purchases? (Round your answer to 4 decimal places.)

b. How many purchases should she expect? (Round your answer to 1 decimal place.)

c. What is the likelihood that four or more "hits" result in a purchase? (Round your answer to 2 decimal places.)

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Step 1

(a)

The likelihood of exactly four purchases is,

Step 2

Thus, the likelihood of exactly four purchases is 0.1311.

(b)

The number of purchases should she expect is,

Step 3

Thus, the number purchases should she expect is 2.4.

(c)

The likelihood that fou...

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