Ripoff Coffee Co. sells coffee in cans that they promise contain a minimum of 2 pounds ...

Ripoff Coffee Co. sells coffee in cans that they promise contain a minimum of 2 pounds. U. R. Busted, an inspector for the FTC [Federal Trade Commission], takes a sample of 42 cans to see if they actually contain at least 2 lbs at a .0102 level of significance. His sample results: x-bar = 1.92 lb with σ = .22 lb. What will U.R. find?

 

In recent years, 22 percent of the American made automobiles sold in the United States were manufactured by General Motors, 24 percent by Ford, 6 percent by Daimler-Chrysler, and 48 percent by all others. A sample of the sales of American-made automobiles conducted last week revealed that 36 were manufactured by Daimler Chrysler, 220 by Ford, 125 by GM, and 345 by all others. Do these observations fit with the expected values at a .01 level of significance?

A recent MBA graduate, who is not too bright, is trying to decide between two job offers, one in Trenton and one in Maui. DUH! One factor affecting his decision is the cost of a new home in each city. A recent study sampled 66 new home sales in the Trenton area and found that the mean selling price of a new home was $176,900 with a population standard deviation of $59,000. A similar Maui study based on a sample of 54 new home sales found that the mean selling price was $198,500 with a population standard deviation of $49,800. Conduct a test at the .034 level of significance to determine if there is any real difference in the mean selling price of new homes in these two cities.