The Quality Control Manager of a Tire Company Wishes to Estimate

question 7

Multiple Choice

The quality control manager of a tire company wishes to estimate the tensile strength of a standard size of rubber used to make a class of radial tires. A random sample of 61 pieces of rubber from different production batches is subjected to a stress test. The test measures the force (in pounds) needed to break the rubber. According to the sample results, the average pressure is 238.4 pounds with a population standard deviation of 35 pounds. Determine the 98 percent confidence interval.

• A) [227.96, 248.84]
• B) [236.64, 240.16]
• C) [233.63, 243.17]
• D) [229.21, 247.59]

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Definitions:

Presentment Warranties

are assurances given by a party during the presentation of a negotiable instrument that certain facts are true.

Drawer

A drawer is the party that issues or writes a check or draft instructing the drawee, such as a bank, to pay a specified sum of money to a third party, the payee.

Breach of a Warranty

The failure to fulfill the terms of a promise or guarantee given regarding the quality or duration of a product or service.

Alters

To change or modify something, which can refer to physical alterations, adjustments in plans or behaviors, or amendments in documents.