2) Construct the confidence interval for the proportion by hand. Use a confidence level of 90% You want to know what is the true percentage of people who have a disease is. The most practical way is...

Extracted text: 2) Construct the confidence interval for the proportion by hand. Use a confidence level of 90% You want to know what is the true percentage of people who have a disease is. The most practical way is to pick a sample at random from a population and then see how many have the disease. You collected a simple random sample of 570 people. You found out that 176 of them had the disease. 2a) The critical value is (3 decimals)