If the Scores on a Test Have a Mean of 26

question 23

Multiple Choice

If the scores on a test have a mean of 26 and a standard deviation of 4, what is the z-score for a score of 18?

• A)2
• B)-1.41
• C)-2
• D)11

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Definitions:

Bias

A systematic error or deviation from the truth in results or inferences.

Normal Distribution

A bell-shaped curve distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean.

Simple Random Sample

A portion of a broader statistical population where each member has an equal likelihood of selection.

Probability

The measure of the likelihood that an event will occur, expressed as a number between 0 and 1.