Finding Z - Score

Front

What is a z-score?

Back

A z-score indicates how many standard deviations an element is from the mean of a distribution.

Front

What is the formula for calculating a z-score?

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

How do you find the z-score for a value of 50, with a mean of 45 and a standard deviation of 2.1?

Back

Front

How do you find the z-score for a value of 29, with a mean of 22 and a standard deviation of 3.1?

Back

Front

What is the purpose of z-scores?

Back

Z-scores describe the exact location of a score within a distribution.

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

If a z-score is 1.5, what does this mean?

Back

A z-score of 1.5 means the value is 1.5 standard deviations above the mean.

Front

If a z-score is -1.25, what does this mean?

Back

A z-score of -1.25 means the value is 1.25 standard deviations below the mean.