Servings of fruits and vegetables. The following table gives the distribution of the number of servings of fruits and vegetables per day in a population.
|
Number of servings X
|
0
|
1
|
2
|
3
|
4
|
5
|
|
Probability
|
0.3
|
0.1
|
0.1
|
0.2
|
0.1
|
0.2
|
Find the mean and the standard deviation for this random variable.