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.)
Contingency Table
A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.
Binomial Distribution
Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.
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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