Friday

March 27, 2015

March 27, 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

**Answer this Question**

**Related Questions**

statistics - A statistics professor receives an average of five e-mail messages ...

Statistics - Service times for customers at a post office follow some right-...

Math - What is tbe next row of the following table? 0 2 2 2 0 0 0 0 0 0 2 4 6 4 ...

statistic - Quiz has 6 questions. Each question has five possible answers, only ...

Math - A college student is using the following model to determine the total ...

Math - For a binomial distribution with n=20 trials and probability of success p...

Statistics - Assume that a procedure yields a binomial distribution with n=3 ...

statistics - On average, 30-minute television sitcoms have 22 minutes of ...

statistics - On average, 30-minute television sitcoms have 22 minutes of ...

statistics - On average, 30-minute television sitcoms have 22 minutes of ...