The county clerk wants to estimate the proportion of retired voters who will nee

Question

The county clerk wants to estimate the proportion of retired voters who will need special election facilities. Suppose a sample of 400 retired voters was taken.

a.) If 150 need special election facilities, calculate an 80% confidence interval for the population proportion.

b.) If 150 need special election facilities, calculate an 90% confidence interval for the population proportion.

My answers:

a.) = .375±.03

b.) = .375±.04

I AM LOOKING FOR SOMEONE TO CONFIRM MY ANSWERS ARE CORRECT OR TO EXPLAIN WHAT THE RIGHT ANSWER IS SO I CAN SEE WHERE i WENT WRONG.

Explanation / Answer

You are correct.

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