Chapter 7, Problem 15PS

a.

To determine

Determine the probability that the sample proportion is less than $57\%$ .

b.

To determine

Determine the probability that the sample proportion lies between $52\%$ and $62\%$ .

c.

To determine

Determine the probability that the sample proportion is more than $62\%$ .

d.

To determine

Determine the probability that the sample proportion is less than $57\%$ for a sample size of $400$ .

To determine

Determine the probability that the sample proportion is between $52\%$ and $62\%$ for a sample size of $400$ .

To determine

Determine the probability that the sample proportion is more than $62\%$ for a sample size of $400$ .