8 Find the standard deviation of the probability mass function below. 19 20 21 22 23 P(X) 0.2 0.2 0.3 0.2 0.1 1.55 O 1.24 1.56 O 1.25

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A:

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A: Mean(μ)=E(X)=∑X.P(X)E(X2)=∑X2.P(X)Variance(σ2)=E(X2)-E(X)2Standard deviation(σ)=E(X2)-E(X)2

Q: P.v.g.g.g.f.

A: d.)P(−c≤Z≤c)Note that:P(−c≤Z≤c)=P(Z≤c)−P(Z≤−c)P(Z≤c)−P(Z≤−c)=0.6528We have: We can then modify the…

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A: The function is PDF if ∑pi=1 u2+0.05+0.35+u+0.15=13u2=920u=310=0.3

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Q: e probability that P(1 < X< 3)

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Q: P(x) 0.645 1. 0.297 0.052 0.005 0.001 0.000 2345

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Q: 5/1/24, 11:52 PM A L Solve the problem. 17) The accompanying table shows the probability…

A: xP(x)x*P(x)x2*P(x)10.10.10.120.220.440.8830.160.481.4440.10.41.650.170.854.2560.251.59…