Question

5 points Save YOU WEB smoan Salary of maple in a country, so you as a random sampel225 people from around come had an awesos de Calculate the Upper Limit of the 99% confidence interval for the mean salary on the people in the country Reminder You only need to calculate the permit of the confidence interval

Answer 1

- 225 Randomly Sample Size (n) 845 0.00 004 Sample average 500.00 os population standard deviation X=8450, O = 500 n=225 standard deviation due to population sample Known is greater and size n' than use l- distribution X- Confiden margin of error interval ence .X t tal 음 Critical Z with assosciated score can be calculated 99% confidence interval by using left tail area of 1-dh 992 2= 1- 99 0.01 100 HN I -0.005 Z=-2.58 sh orta Z=2.58 the area lies in erdh Z- table -0.995 starting with 2.5 and csef canzad vango w 1CamScanner

the columns of 0.08 Value Zay= 22.58 xalá 992 confidence interval I Bal 8450 + 2,58 (500) 225 8450 86 =(8450-86, 8450 +88) (8364, 8536) 99% Confidence interval=/8364 CM2 8536 bound ☆ + tha Upper 8536,00 od upper bound bound 8364 Scannecoviler CamScanner CS