The Quality Control Manager of a Major Cell Phone Provider

question 135

Multiple Choice

The quality control manager of a major cell phone provider is concerned about the life of the cell phone batteries they use. He took a sample of 13 batteries from a recent shipment and used them continuously until they failed to work. The manager measured the number of hours the batteries lasted and found the mean to be 550.4 with a standard deviation of 315.3.
-How would you define the rejection region for this test at ? = .10?

• A)t > 1.711
• B)t > 1.356
• C)t > 2.492
• D)t > 3.646 and t < -3.646
• E)t > 3.787

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Definitions:

Profit-Maximizing

The strategy employed by a business to identify the optimum price and quantity of production for maximizing earnings.

Price-Elastic

A term that describes how sensitive the demand for a good or service is to changes in its price; high elasticity means demand changes significantly with price changes.

Microsoft

A multinational technology company known for its software products, including the Windows operating system and the Office suite.

Linear Demand Curve

A straight-line graphical representation showing the inverse relationship between the price of an item and the quantity demanded.