13. A pet store owner wanted to know the average number of fish purchased by her customers. She thought there should be a mean of 13 fish with a standard deviation of 1.8 fish but was afraid it was lower and wanted to test this hypothesis. Using a sample of 32 customers, she found the average number of fish purchased was 12.25. Using an of .01 and the classical approach, determine whether she should reject her null hypothesis or not