Waiting Times You are analyzing the sample of waiting times in Exercise 23.

The population standard deviation of the waiting times should be less than 7.9 minutes. Does the confidence interval you constructed for σ suggest that the variation in the waiting times is at an acceptable level? Explain your reasoning.

Data from Exercises 23

The waiting times (in minutes) of a random sample of 26 people at a book-signing event have a sample standard deviation of 4.9 minutes. Use a 99% level of confidence.