The marketing manager of a cell phone company is working on an advertising plan that is to be directed toward a young audience. In conjunction with the plan, the manager states that the median age of the company’s customers is younger than 40. Before actually completing the advertising plan, the manager decided to randomly sample customers. Among the questions asked in a survey of 50 customers was the customers’ ages. The data are in the file Cell Phone Survey.

a. Examine the sample data. Is the variable being measured a discrete or a continuous variable? Does it seem feasible that these data could have come from a normal distribution?

b. The marketing manager must support his statement concerning customer age in an upcoming board meeting. Using a significance level of 0.10, provide support for the marketing manager.