Consider the following probabilities

x -4 -3 -2 -1 0 1 2 3 4

p(x) .02 .07 .10 -- .30 .18 .10 .06 .02

What is the variance ² ?Question 2 options:

a)

3.00

b)

2.80

c)

3.10

d)

2.90

e)

2.94