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Solve the question and show all steps: Consider the probability distribution shown here: Y -40 -30 -20 -10 0 10 20 30 40 P(Y) .02 .07 .10 .15 .30 .18 .10 .06 .02 a. Calculate E(Y) or...

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Statistics

Solve the question and show all steps: Consider the probabilitydistribution shown here:

Y-40-30-20-10010203040
P(Y).02.07.10.15.30.18.10.06.02

a. Calculate E(Y) or µ, VAR(Y) or ? 2 , and STDV(Y) or σ

b. Graph P(Y). Locate µ, µ - 2σ, and µ + 2σ on the graph

c. What is the probability that Y is in the interval ? ± 2??

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