A college statistics professor has office hours from 9am to 10:30 am daily. A sample of waiting time to see the professor(in minutes) is 10,12 20, 15, 17, 10, 30, 28,35, 28, 19, 27, 25, 22, 33, 37, 14, 21, 20, 23. Assuming standard deviation is 7.84, find the 95.44% confidence interval for the population mean.

a) -7.7 to 7.8 minutes
b) 19.5 to 35.1 minutes
c) -3.5 to 3.5 minutes
d) 18.8 to 25.8 minutes

Answer rating: 100% (QA)

Given n20 xbar223 based on the da... View the full answer