See attached file - Formulas for Discrete Probability Distributions© BrainMass Inc. brainmass.com June 3, 2020, 6:14 pm ad1c9bdddf
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X P (X) X * P (X) X - 7.2 (X - 7.2)^2 (X - 7.2)^2 * P ...
The solution provides step by step method for the calculation of mean, variance and standard deviation of a discrete probability distribution. Formula for the calculation and Interpretations of the results are also included.