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2.7 Measures of the Spread of the Data

Consist of numbers that provide information about data variability.

Responsible for showing how close or separated the data of a distribution is.

Range

Numerical value that indicates the difference between the maximum and minimum value

Variance

Arithmetic measure of the squares of the deviations from the mean of a statistical distribution.

Mean Deviation

Population

Sample

Is the dispersion parameter used to calculate how much the data deviate on average from the arithmetic mean distribution.

Standard Deviation

Used to determine whether a particular data value is close to or far from the mean.

Variation Coefficient

Population

Sample

Is a relation between the standard deviation of a sample and its mean.