The Quality Control Manager of a Major Cell Phone Provider

question 14

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.
-The appropriate test statistic to test the hypotheses is _____.

• A)6.20
• B)1.72
• C)0.477
• D)-6.20
• E)-1.72

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Definitions:

Confirmation Number

A unique code used to verify the authenticity or reservation status of services or transactions.

URL

Uniform Resource Locator, the address of a resource on the internet, providing the means to locate and access web pages and other data.

Protocol

A set of rules and standards that define how data is transmitted and received over a network.