2.1 Assignment*: Z-Scores

Front

What is a z-score?

Back

A z-score is a statistical measurement that describes a value's relationship to the mean of a group of values. It indicates how many standard deviations an element is from the mean.

Front

How do you calculate a z-score?

Back

Front

What does a positive z-score indicate?

Back

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

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What does a negative z-score indicate?

Back

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

Front

If Tori has a z-score of 2.5 and Alexis has a z-score of 1, who performed better?

Back

Tori performed better because her z-score is more positive, indicating she is further above the mean.

Front

What is the mean in statistics?

Back

The mean is the average of a set of values, calculated by adding all the values together and dividing by the number of values.

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What is standard deviation?

Back

Standard deviation is a measure of the amount of variation or dispersion in a set of values. A low standard deviation means that the values tend to be close to the mean.

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What is the symbol for standard deviation?

Back

The symbol for standard deviation is σ (sigma).

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What is the symbol for the mean?

Back

The symbol for the mean is μ (mu).

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What does a z-score of 0 mean?

Back

A z-score of 0 means that the data point is exactly at the mean.