Recent statistics suggest that 15 percent 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 15 "hits" to her site and found that 4 had actually made a purchase. a) What is the likelihood of exactly 4 purchases? For full marks your answer should be accurate to at least four decimal places. Probability = 0 b) How many purchases should she expect? For full marks your answer should be accurate to at least two decimal places. Number of purchases = 0 c) What is the likelihood that 4 or more "hits" result in a purchase? For full marks your answer should be accurate to at least four decimal places.
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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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Recent statistics suggest that 15 percent 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? b. How many purchases should she expect? c. What is the likelihood that four or more "hits" result in a purchase?
According to a survey, only 15% of customers who visited the website of a major retail store made a purchase. Random samples of size 50 are selected. 1. What proportion of the samples will have between 20% and 30% of customers who will make a purchase after visiting the website? (4 decimal places) 2. What proportion of the samples will have less than 15% of customers who will make a purchase after visiting the website? (1 decimal place) 3. What is the probability that at least 30% of customers in the sample who will make a purchase after visiting the website? (4 decimal places)
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