Computing the Variance and Standard Deviation

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    • Steps in Finding the Variance and Standard deviation
      1.  Find the mean of the probability distribution.
      2. Subtract the mean from each value of a random variable X.
      3.  Square the results obtained in Step 2.
      4.  Multiply the results obtained in Step 3 by the corresponding probability.
      5. Get the sum of the results obtained in Step 4.
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