Copy of discreet probability distribution

# Copy of discreet probability distribution - 0 times 0.05 1...

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Discreet probability distribution number of cars folks own at brent's building x p(x) X*p(x) x^2 x^2*p(x)  0 0.05 0 0^2=0 0 1 0.26 0.26 1^2=1 0.26 2 0.37 0.74 2^2=4 1.48 3 0.29 0.87 3^2=9 2.61 4 0.03 0.12 4^2=16 0.48 Sum 1 1.99 4.83 mean 1.99 variance 0.87 standard deviation  0.93

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take your x squared column times your p(x) column
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Unformatted text preview: 0 times 0.05 1 times 0.26 4 times 0.37 9 times 0.29 16 times 0.03 sum of x*p(x) sum of x squared times p(x) minus the mean so, 4.83-(1.99)^2 equals the square root of the variance...
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