The Cell Tone Company sells cellular phones and airtime in several states. At a recent meeting, the marketing manager stated that the median age of its customers is less than 40. This came up in conjunction with a proposed advertising plan that is to be directed toward a young audience. Before actually completing the advertising plan, Cell Tone decided to randomly sample customers. Among the questions asked in a survey of 50 customers in the Jacksonville, Florida, area 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 this support for the marketing manager.