AFDA - 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 do you calculate a Z-score?

Back

Front

What does a Z-score of 0 indicate?

Back

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

Front

What does a positive Z-score indicate?

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

Front

What does a negative Z-score indicate?

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

Front

If the mean is 20 and the standard deviation is 3, what is the Z-score for 23?

Back

Front

What is the mean of a data set?

Back

The mean is the average of all data points in a set, calculated by summing all values and dividing by the number of values.

Front

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

Back

Front

What is standard deviation?

Back

Standard deviation is a measure of the amount of variation or dispersion in a set of values.

Front

If the mean is 21 and the standard deviation is 1.3, what is the Z-score for 22?

Back