An insurance analyst working for a car insurance company wou

An insurance analyst working for a car insurance company would like to determine the proportion of accident claims covered the company. A random sample of 200 claims shows that the insurance company covered 80 accident claims while 120 claims were not covered. Construct a 95% confidence interval estimate of the true proportion of claims covered by the insurance company

please show all work

Solution

80/200 +- 1.645 (sq root .4 * .6/200) = [.343,457]