The National Sales Manager of Fast Grow Corp Is Working

Multiple Choice

The national sales manager of Fast Grow Corp is working on next year's budget projections.He knows that the population standard deviation is $17.66.To estimate the daily per diem cost for outside sales people,he has taken a random sample of 36 individual expense accounts and found a mean of $90.29.The 91.08 percent confidence interval for the per diem expense is:

A) 86.45 to 94.13.
B) 60.27 to 120.37.
C) 85.29 to 95.29.
D) 74.43 to 107.9.
E) 84.32 to 96.26.