Question: The manager of the Prescott HyVee Food Emporium, Bob Sugars, wants to know what the mean dollars spent per visit by his customers to the Emporium. For two weeks he asks his checkout clerks to keep copies of the paper receipts from all foods purchased at the Emporium, he then selected 100 at random. He found that the average spent at the Emporium was $45.67 with a sample standard deviation of $12.30. At the .05 level, what is the range that you could expect these purchases to realistically fall within?