The random variable x is the number of houses sold by a realtor in a single month at the real-estate office. Its probability distribution is:
|
Houses sold (x)
|
Probability P(x)
|
|
0
|
0.09
|
|
1
|
0.24
|
|
2
|
0.21
|
|
3
|
0.17
|
|
4
|
0.03
|
|
5
|
0.15
|
|
6
|
0.09
|
|
7
|
0.02
|
a. Compute the mean of the random variable.
b. Compute the standard deviation of the random variable.