ONLINE COURSE | Chapter 3 Numerical Descriptive Measures

Опубликовано: 20 Июнь 2026
на канале: Chamreun IBM
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To compute the Z-score of a data value, subtract the mean and divide by the standard deviation.
The Z-score is the number of standard deviations a data value is from the mean.
A data value is considered an extreme outlier if its Z-score is less than -3.0 or greater than +3.0.

The larger the absolute value of the Z-score, the farther the data value is from the mean.

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