4. Roger Hall, who oversees six Ford dealerships, believes that the colors chosen by customers who special-order their cars best reflect most customers true color preferences. For that reason, he has tabulated the color requests specified in a sample

of 56 Mustang coupe special orders placed this year. The sample

data are listed below.

Black Red Red White Green Black Blue Red Blue Black Red Red Green Red

White Blue Red Black Green Blue Black

Blue White Black White White Black White

Blue Green Red Red Blue Black Black Red Black Red Red Black Black Red

Red Black White Black Red Green Black

Black Black Green Blue White Black White

a.What is the point estimate of the proportion of all Mustang coupe special orders that specify a color preference of black?

b.Describe the sampling distribution of