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March 2, 2015

March 2, 2015

Posted by **Denise** on Wednesday, March 3, 2010 at 2:07pm.

X 0 1 2 3

P(X) .35 .35 .25 .05

a. What is the probability that no emails will be received?

b. What is the probability that at least one email will be received?

c. What is E(X), the expected number of emails that will be received?

d. What is Var(X), the variance of the number of emails that will be received?

e. What is the Std(X), the standard deviation of the number of emails that will be received?

- Statistics -
**bobpursley**, Wednesday, March 3, 2010 at 2:26pmI will do one:

c: expected value: 0*.35+1*.35 + 2*.25 + 3*.05= 1

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