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Section 3.4
Measures of Relative Standing
Term | Definition |
---|---|
Z Score | (standardized value) the number of standard deviations that a given value 'x' is above or below the mean |
Ordinary Values | -2 < z score < 2 |
Unusual Values | z score < -2 or z score >2 |
Percentiles | measures of location; 99 percentiles which divide a set of data into 100 groups with about 1% of the values in each group Percentile of Value X = number of values less than x divided by total number of values multiplied by 100 |