When Selecting a Pair of Random-Sample Means from a Single

question 45

Multiple Choice

When selecting a pair of random-sample means from a single population, the probability of the first mean being higher than the second mean is

• A) 1.00
• B) 0
• C) .50
• D) either a or b, but never c

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Definitions:

National Norms

Statistical standards based on the performance of a national sample that provide benchmarks for comparing individual or group scores.

Interquartile Range

The Interquartile Range is a statistical measure of variability, defined as the difference between the upper and lower quartiles, used to describe the spread of data points in a dataset.

Mean

Mean is a statistical measure representing the average value in a set of numbers, calculated by adding all the values together and dividing by the number of values.

National Mean

The average score of a given population on a particular test or assessment.