(Answered) Question economics and finance when unemployment rises high

Statistics

Question: Economics and Finance When unemployment rises, high school students face more competition from college students and adult workers for summer jobs. In a random sample of 188 high school students looking for summer work, 61 said they were able to find a job.

a. Find a 95% confidence interval for the true proportion of high school students who were able to find a summer job.

b. In a similar study the previous year, the sample proportion of high school students who were able to find a job was 0.25. Use this estimate to find the sample size necessary for the bound on the error of estimation to be 0.025 with confidence level 95%.

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