Website visitors are often loath to disclose personal

Reference no: EM13606237

Website visitors are often loath to disclose personal information when making a purchase on the Internet. Despite safeguards in place, nearly 60% of all consumers who make purchases on the Internet do not feel comfortable giving their credit card number. Suppose that X is a random variable that represents the number of website purchasers who do not feel comfortable typing their credit card numbers online from a sample of 20 purchasers.

a) Why is X a binomial random variable?

b) What is the probability that X is less than six?

c) Would you consider the event of X less than six to be unusual?

d) What value would you expect X to be on average? What is the standard deviation of X?

Reference no: EM13606237

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