Z-Scores & Z-tables

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 do you calculate a Z-score?

Back

Front

What does a Z-score of 0 represent?

Back

A Z-score of 0 indicates that the data point is exactly at the mean.

Front

What does a positive Z-score indicate?

Back

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

Front

What does a negative Z-score indicate?

Back

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

Front

What is the purpose of a Z-table?

Back

A Z-table shows the percentage of values to the left of a given Z-score in a standard normal distribution.

Front

If the mean is 52 and the standard deviation is 6, what is the Z-score for a value of 58?

Back

Front

If the mean is 290 and the standard deviation is 20, what is the Z-score for a value of 265?

Back

Front

What is the mean of a normal distribution?

Back

The mean of a normal distribution is the central value around which the data is distributed.

Front

What is the standard deviation in a normal distribution?

Back

The standard deviation measures the dispersion or spread of the data points around the mean.