It is computed using the formula μ=∑xP(x). The variance σ2 and standard deviation σ of a discrete ramdom variable X are numbers that indicate the variability of X over numerous trials of the experiment. They may be computed using the formula σ2=[∑x2P(x)]−μ2.
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It is computed using the formula μ=∑xP(x). The variance σ2 and standard deviation σ of a discrete ramdom variable X are numbers that indicate the variability of X over numerous trials of the experiment. They may be computed using the formula σ2=[∑x2P(x)]−μ2.
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