A Researcher Is Interested in Evaluating a Certain Brand of Radial

question 127

Short Answer

A researcher is interested in evaluating a certain brand of radial auto tire. Twenty tires are randomly selected from retail outlets throughout the country, and each is placed on a special machine which rotates the tires at a constant speed (equivalent to 55 miles per hour) against the friction equivalent of a 4000 pound auto being driven on a smooth highway. Each tire is run until there is no tread left. The number of miles (in thousands) were as follows: 40, 30, 32, 35, 39, 35, 31, 36, 37, 35, 34, 35, 37, 34, 36, 38, 35, 36, 35, 36.
-Setting alpha at .05, test the hypothesis that this sample of tires could represent a population whose mean was 36.50

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Definitions:

Market Researchers

Professionals who study consumer behaviors, preferences, and trends to help companies make informed product and marketing decisions.

Physical Similarities

The extent to which objects or individuals share common physical characteristics or attributes.

Product Mix

The total range of products or services that a company offers to its customers.