# Question

A notebook computer dealer mounts a new promotional campaign. Purchasers of new computers may, if dissatisfied for any reason, return them within 2 days of purchase and receive a full refund. The cost to the dealer of such a refund is $100. The dealer estimates that 15% of all purchasers will, indeed, return computers and obtain refunds. Suppose that 50 computers are purchased during the campaign period.

a. Find the mean and standard deviation of the number of these computers that will be returned for refunds.

b. Find the mean and standard deviation of the total refund costs that will accrue as a result of these 50 purchases.

a. Find the mean and standard deviation of the number of these computers that will be returned for refunds.

b. Find the mean and standard deviation of the total refund costs that will accrue as a result of these 50 purchases.

## Answer to relevant Questions

A family of mutual funds maintains a service that allows clients to switch money among accounts through a telephone call. It was estimated that 3.2% of callers either get a busy signal or are kept on hold so long that they ...List four examples of discrete random variables that could be observed in a new consulting business. A customer service center in India receives, on average, 4.2 telephone calls per minute. If the distribution of calls is Poisson, what is the probability of receiving at least 3 calls during a particular minute? Compute the probability of 9 successes in a random sample of size n = 20 obtained from a population of size N = 80 that contains 42 successes. Consider the joint probability distribution: a. Compute the marginal probability distributions for X and Y. b. Compute the covariance and correlation for X and Y. c. Compute the mean and variance for the linear function W = ...Post your question

0