Periodically, a Sample of 20 Items Are Randomly Selected from a Population

question 62

Multiple Choice

Periodically, a sample of 20 items are randomly selected from a population that is normally distributed, the average is computed, and plotted. Which of the following statements is correct?

• A) The average of the logarithms of the values is lognormally distributed. II. The standard deviation of the averages is equal to the standard deviation of the individuals divided by the square root of 20. III. The variance of the averages is equal to the variance of the individuals divided by the square root of 20.
• B) I only
• C) II only
• D) I and II only
• E) I and III only

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Definitions:

Construct Validity

Construct validity refers to the extent to which a test or instrument measures the theoretical construct it is intended to measure.

Differential Validity

Differential validity is the extent to which a test predicts outcomes differently for distinct groups, often analyzed to assess fairness across demographics.

Validation Studies

Research conducted to ensure that a tool, test, or method accurately measures what it is supposed to measure.

Concurrent Validity

A measure of how well a new test predicts outcomes according to an established benchmark or criterion test, carried out at the same time.