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What is standard deviation? Sales Volume per Day (X) 0 1 2 3 4 5 Totals Number of f(x) or p(x) days 50 70

What is standard deviation? Sales Volume per Day (X) 0 1 2 3 4 5 Totals Number of f(x) or p(x) days 50 70 120 40 50 20 350 Xf(x) mu X-mu (X-mu)^2 f(x)(X-m

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