Background data: Hoping to see through Lex's plan, Clark uses a fake name to place several orders for Megalopizzas, and he collects a random sample of 49 them for analysis. He measures the diameter of each pizza, enters the results in Microsoft Excel, and calculates several sample statistics, tabulated below

Sample statistic Value Min 18.022 inches Max 19.501 inches Mean 18.880 inches Median 18.814 inches Standard deviation 0.400 inches