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MEASURES OF VARIATION

LUIS ROBERTO CRUZ AL

Created on November 27, 2023

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Transcript

MEASURES OF VARIATION

VARIANCE

RANGE

STANDARD DEVIATION

DEVIATION

RANGE

The range is the difference between the maximum and minimum data entries. To find the range, the data must be quantitative.

DEVIATION

The deviation of an entry 'x' in a population data set is the difference between the entry and the mean of the data set.

EXAMPLE

SOLUTION

POPULATION VARIANCE

When you add the squares of the deviations, you compute a quantity called the sum of squares, denoted SSx. In a population data set, the mean of the squares of the deviations is called the population variance.

POPULATION VARIANCE

POPULATION STANDARD DEVIATION

The population standard deviation of a population data set of N entries is the square root of the population variance.

EXAMPLE

EXERCISE #15

EXERCISE #15