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.) Likelihood b. How many purchases should she expect? (Round your answer to 1 decimal place.) Expected purchases c. What is the likelihood that four or more "hits" result in a purchase? (Round your answer to 2 decimal places.) Likelihood
Added by Melissa R.
Step 1
The problem involves a fixed number of trials (16 "hits"), each with two possible outcomes (purchase or no purchase), and a constant probability of success (15% or 0.15). This is a binomial distribution problem. Show more…
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