As part of a marketing study, Sleep ’n’ Dream wants

As part of a marketing study, Sleep ’n’ Dream wants to estimate, for customers who have recently purchased a mattress and box spring, the average number of stores that customers visited before making their purchase. A sample of six customers is randomly selected, with the following results:,Use this sample data to construct a 90% confidence interval estimate of the average number of store visits for the population represented here. Assume that the population of values is approximately normal.