There Is an Average of 22

Multiple Choice

There is an average of 22.455 employees at 22 office furniture dealers in a major metropolitan area, with a standard deviation of 18.52. Construct a 99 percent confidence interval for the true mean number of full-time employees at office furniture dealers.

A) [11.014, 33.896]
B) [11.275, 33.635]
C) [12.284, 32.626]
D) [12.513, 32.397]
E) [20.072, 24.838]