The Mean Replacement Time for a Random Sample of 12 $$\sigma ^ { 2 }$$

question 87

Multiple Choice

The mean replacement time for a random sample of 12 cd players is 8.6 years with a standard deviation of 3.5years. Construct the 98% confidence interval for the population variance, $$\sigma ^ { 2 }$$ . Assume the data are normallydistributed

• A) (5.4, 44.1)
• B) (2.3, 6.6)
• C) (1.6, 12.6)
• D) (5.1, 37.7)

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Definitions:

Test Validity

The degree to which a test accurately measures what it is intended to measure, ensuring that the test results are relevant and meaningful for its purpose.

Test Reliability

The degree to which an assessment tool produces stable and consistent results over repeated applications.

Hostile Work Environment

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A form of sexual harassment that means “in exchange for this, I’ll give you that.”