A baseball player is asked to swing at pitches in sets of four.The player swings at 100 sets of 4 pitches.The probability distribution for hitting a particular number of pitches is given below.

x

0

1

2

3

4

P(x)

0.02

0.07

0.22

0.27

0.42

Use Excel to determine the mean, standard deviation, and variance of the distribution.