Salaries of 44 college graduates who took a Statistics course in college have a mean of $62,300. Assuming a population standard deviation is known to be $15,497. Construct a 90% confidence interval for the mean salaries of college graduates who took a Statistics course.

Bella want to know what the students at her school think of her show. which is the best group to survey to find this information a. go to the mall and ask all of the students she recognizes from school b. ask her viewers to call in durning an episode of the show c. get a list of students at her school from the office and use a random number generator to pick 30 of them d. get a list of students at her school from the office and pick the first 30 students on the list