A sample of 25 different payroll departments found that the employees worked an average of 310.3 days a year with a population standard deviation of 23.8 days. Assuming the distribution is approximately normal, find the 90% confidence interval for the average number of days worked for all payroll departments. Round to final answers to one decimal place.

answer: hey there,

the answer you are looking for is a..

hope this you!

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.

30005

yes ok