Problem 1. the owner of a gasoline station wants to study gasoline
Problem 1. The owner of a gasoline station wants to study gasoline purchasing habits by motorists at his station. He selects a random sample of 60 motorists during a certain week with the following results: the sample mean for purchases was 11.3 gallons, the sample standard deviation was 3.1 gallons, and 11 motorists purchased premium‐grade gasoline. At the 0.10 level of significance (i.e., use α […]