(Choose 1 answer)
(See picture)
A. about 5.97 miles.
B. about 9.02 miles.
C. nearly 12.0 miles.
D. about 7.83 miles.
In an application to estimate the mean number of miles that downtown employees commute to work roundtrip each day, the following information is given:
n = 20,x = 4.33,s = 3.50
Based on this information, what is the upper limit for a 95 percent two-sided confidence interval estimate for the true population mean?
Let Z0.025 1.96, 20.05 = 1.65, to.025,19=2.09 and to.05,19 = 1.73.
25
