Calculating Z-Scores

Front

What is a z-score?

Back

Front

How do you calculate a z-score for a population?

Back

Front

What is the mean of z-scores?

Back

The mean of z-scores is always 0, regardless of the mean of the raw scores.

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 the mean is 50 and the standard deviation is 10, what is the z-score for a value of 60?

Back

Front

What is the z-score for a value of 3 if the mean is 7.6 and the standard deviation is 4.5?

Back

Front

What is the formula for calculating the z-score of a sample?

Back

Front

What is the significance of a z-score of 0?

Back

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

Front

How do you interpret a z-score of +2?

Back

A z-score of +2 indicates that the value is 2 standard deviations above the mean.