If We Know That a Set of Test Scores Has

question 57

Multiple Choice

If we know that a set of test scores has a mean of 75 and a standard deviation of 8, we would conclude that

• A) the average deviation from the mean is about 8 points.
• B) the average person will have a score of 75 + 8 = 83.
• C) more people are above 75 than below it.
• D) You can't tell anything about how scores lie relative to the mean.

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Definitions:

One-tailed

Describes a hypothesis test or statistical analysis where the significance is tested in only one direction, indicating the expected direction of an effect.

Directional

In hypothesis testing, directional refers to a hypothesis that specifies the direction of an expected difference or relationship (e.g., greater than, less than) between two groups or variables.

≠ Symbol

A mathematical symbol indicating that two values are not equal.

Two-tailed

A type of statistical test that is designed to consider both directions of effect or difference, allowing for the exploration of relationships in both positive and negative directions.