I need help with question c ( only focus on that one)

The random variable X is the crew size of a randomly selected shuttle mission. Its probability distribution is shown below. Complete parts a through c.

x

2

4

5

6

7

8

P(X=x)

0.032

0.049

0.266

0.267

0.379

0.007

a.

Find and interpret the mean of the random variable. Is

=.5901

(Round to three decimal places asneeded.)

Interpret the mean. Select the correct choice below and fill in the answer box to complete your choice.

(Round to three decimal places asneeded.)

A.

The average number of persons in a shuttle crew is

5901 person(s).

Your answer is correct.

B.

The most common number of persons in a shuttle crew is

person(s).

b. Obtain the standard deviation of the random variable.

1.171

c. The mean is

Theone-standard-deviation interval is

thetwo-standard-deviation interval is

thethree-standard-deviation interval is

(Type integers or decimals rounded to three decimal places as needed. Use ascendingorder.)