Chapter 7, Problem 14PS

a.

To determine

Determine the probability that the sample proportion is less than $85\%$ .

b.

To determine

Determine the probability that the sample proportion lies between $75\%$ and $85\%$ .

c.

To determine

Determine the probability that the sample proportion is more than $82\%$ .

d.

To determine

Determine the probability that the sample proportion is less than $85\%$ for a sample size of $400$ .

To determine

Determine the probability that the sample proportion is between $75\%$ and $85\%$ for a sample size of $400$ .

To determine

Determine the probability that the sample proportion is more than $82\%$ for a sample size of $400$ .