Z-Scores

Front

What is a Z-Score?

Back

A Z-Score indicates how many standard deviations an element is from the mean of a data set.

Front

How is the Z-Score calculated?

Back

Front

What does a Z-Score of 0 indicate?

Back

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

Front

What does a positive Z-Score signify?

Back

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

Front

What does a negative Z-Score signify?

Back

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

Front

If the mean is 50 and the standard deviation is 5, what is the Z-Score for 55?

Back

Front

If the mean is 100 and the standard deviation is 10, what is the Z-Score for 90?

Back

Front

What is the Z-Score for a value that is 2 standard deviations below the mean?

Back

The Z-Score is -2.00.

Front

What does it mean if a Z-Score is greater than 2?

Back

It means the value is more than 2 standard deviations above the mean, indicating it is significantly higher than average.

Front

What does it mean if a Z-Score is less than -2?

Back

It means the value is more than 2 standard deviations below the mean, indicating it is significantly lower than average.