Lube-Tech Is a Major Chain Whose Primary Business Is Performing

question 84

True/False

Lube-Tech is a major chain whose primary business is performing lube and oil changes for passenger vehicles. The national operations manager has stated in an industry newsletter that the mean number of miles between oil changes for all passenger cars exceeds 4,200 miles. To test this, an industry group has selected a random sample of 100 vehicles that have come into a lube shop and determined the number of miles since the last oil change and lube. The sample mean was 4,278 and the sample standard deviation was 780 miles. Based on this information, the test statistic is approximately t = 1.000.

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Definitions:

Price War

Successive, competitive, and continued decreases in the prices charged by firms in an oligopolistic industry. At each stage of the price war, one firm lowers its price below its rivals’ price, hoping to increase its sales and revenues at its rivals’ expense. The war ends when the price decreases cease.

OPEC

The Organization of the Petroleum Exporting Countries, a group of oil-producing nations that coordinates policies to control the supply and influence the price of oil on the global market.

Oil Cartel

An alliance of oil-producing countries or companies that agree to control oil production levels and prices, often to exert influence on the global market.

Norway

A country in Northern Europe known for its extensive coastline, fjords, and high standards of living.