PHStat

A random sample of 200 physicians shows that there are 36 of them who make at least $400,000 a year. Can we conclude at the 1% significance level that the true proportion of physicians in the population who make at least $400,000 a year is less than 0.24?

and Construct a 99% confidence interval estimate of the population proportion of physicians who make at least $400,000 a year and explain how to use it to test the hypotheses.