Z-SCORES Flashcard Review

Front

What is a Z-score?

Back

A Z-score is a statistical measurement that describes a value's relationship to the mean of a group of values. It is expressed in terms of standard deviations from the mean.

Front

What is the formula to find the Z-score for a population?

Back

Front

What does a positive Z-score indicate?

Back

A positive Z-score indicates that the value is above the mean.

Front

What does a negative Z-score indicate?

Back

A negative Z-score indicates that the value is below the mean.

Front

If a student's Z-score is +2.5, what does this mean?

Back

The student scored 2.5 standard deviations above the average.

Front

How do you interpret a Z-score of 0?

Back

A Z-score of 0 indicates that the value is exactly equal to the mean.

Front

What is the significance of a Z-score greater than +3 or less than -3?

Back

Z-scores greater than +3 or less than -3 are considered outliers, indicating that the value is significantly different from the mean.

Front

How do you calculate the actual score from a Z-score?

Back

Front

If the average score is 82 and the standard deviation is 4, what is the actual score for a Z-score of +3.0?

Back

Front

What is the Z-score for a value of 96 if the average is 80 and the standard deviation is 8?

Back