Z-Score Practice

Front

What does the sign of a z-score indicate?

Back

The sign of the z-score indicates whether the location is above (positive) or below (negative) the mean.

Front

How do you calculate the z-score?

Back

Front

If a student's z-score is -1.50, what does it mean?

Back

It means the student's score is 1.50 standard deviations below the average score.

Front

What is the z-score for a value of 29, with a mean of 22 and a standard deviation of 3.1?

Back

The z-score is 2.26.

Front

What is the z-score for a value of 22, with a mean of 21 and a standard deviation of 1.3?

Back

The z-score is 0.77.

Front

If a data set has a mean of 300 and a standard deviation of 40, what value corresponds to a z-score of -2?

Back

The value is 220.

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

What is the relationship between z-scores and standard deviations?

Back

Z-scores represent the number of standard deviations a value is from 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

The z-score is 1.0.