Question: for questions 3 classify each bold faced number there are...
For questions 3 classify each bold faced number (there are two such numbers in each problem) as a parameter or statistic. Carefully explain your reasoning.
The receiving department of a company inspects a truckload of ball bearings to determine whether the bearings are within specified size limits. It is known, by the shipper but not by the receiving department, that the average diameter of the bearings in this truckload is 2.50cm. The receiving department obtains a random sample of 100 ball bearings from this truckload and finds that the average diameter of these bearings is 2.55cm.