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Standard Deviation Skewness ValueMean30.26354Variance247.0224Standard Deviation15.71695Skewness1.150387Kurtosis3.82424Coefficient of Variation0.519336Minimum9.156000Maximum75.625000Number of Observation180 Q1 Mean (): It is the average value of the observation, which is calculated by taking the sum of observed values (X) divided by the number of observations (N). [pic 1]Variance (σ2): It is a measure of the difference between observed values from the mean or the spread of.