What Is Variance-Covariance

Variance of Discrete Random Variable Explained

Learn how to calculate the variance of a discrete random variable X with this easy-to-understand explanation. The variance can be determined using two formulas: sigma squared equals the sum from i equals one to n of x i minus mu squared times p i, or Var of X equals E of X squared minus E of X squared. Both methods are correct and will give you ...

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