Amarket research team compiled the following discrete probability distribution for families residing in randolph county. in this distribution x represents the number of evenings the family dines outside their home during a week. (a) what is the mean number of evenings family dines outside their home during a week? (b) what is the standard deviation of the number of evenings family dines outside their home?

x

p(x)

0

0.30

1

0.50

2

0.10

3

0.10