EXAMPLE 10 Confidence intervals and prediction intervals using technology

Use Minitab and JMP to construct a 95% confidence interval for the population mean number of text messages sent by all 20-year-olds, and to construct a 95% prediction interval for the number of text messages sent by a randomly selected 20-year-old.

Solution

We use the instructions provided in the Step-by-Step Technology Guide below. Figure 18 shows the Minitab results, and Figure 19 shows the JMP results.