The z-score is a statistical method that indicates how many standard deviations a value is from the mean. It has a variety of math and statistics applications. It is calculated using the following formula:

$$ z = \frac{X - \mu}{\sigma} $$

Where \(X\) is the value or score at issue, \(\mu\) is the average, and \(\sigma\) is the standard deviation.

The z-score is

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