Chapter 10.3, Problem 16P

(a)

To determine

Whether it is appropriate to use the normal distribution to the approximate the ${\widehat{p}}_1-{\widehat{p}}_2$ distribution.

(b)

To determine

To find: The 95% confidence interval for $p_1-p_2$.

(c)

To determine

Whether we are95% confident that $p_1$ is more than $p_2$.