Question 3 John wishes to estimate the population mean salary of college graduates who took a statistics course in college. How many college graduates must he survey? Assume that the population...

Extracted text: Question 3 John wishes to estimate the population mean salary of college graduates who took a statistics course in college. How many college graduates must he survey? Assume that the population standard deviation is known to be $1,136, and he wants to be 99% confident that the sample mean is within $130 of the true population mean. Question 4 Salaries of 25 college graduates who took a statistics course in college have a mean of $81,658 and a standard deviation of $1,322. Construct a 90% confidence interval for estimating the population standard deviation. Enter the upper bound of the confidence interval. (Round your answer to nearest whole dollar.)