Timer
00:00
Your Answer
A
B
C
D
E
Global Stats
Economist GMAT
Teachers in United States high schools teach an average (arithmetic mean) of 80 hours per month, with a variance of 100. which of the following numbers of monthly teaching hours is exactly two standard deviations away from the mean?
A. 60
B. 74
C. 78
D. 82
E. 90
OA A
Teachers in United States high schools teach an average (arithmetic mean) of 80 hours per month, with a variance of 100. which of the following numbers of monthly teaching hours is exactly two standard deviations away from the mean?
A. 60
B. 74
C. 78
D. 82
E. 90
OA A
