Suppose a Research Firm Conducted a Survey to Determine the Mean

question 13

Multiple Choice

Suppose a research firm conducted a survey to determine the mean amount steady smokers spend on cigarettes during a week. A sample of 100 steady smokers revealed that the sample mean is $20. The population standard deviation is $5. What is the probability that a sample of 100 steady smokers spend between $19 and $21?

• A)0.4772
• B)0.0228
• C)0.9544
• D)1.0000

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Definitions:

Content Validity

The extent to which a test measures all aspects of the concept or behavior it is intended to assess.

Construct Validity

The extent to which a test measures what it claims to measure, demonstrating the accuracy of the concept or construct being tested.

Predictive Validity

The extent to which a score on a scale or test predicts future performance on a related outcome.

Parallel Form Reliability

A measure of reliability used to assess the consistency of the results of different forms of the same test.