5. 80 is the mean of which of the following sets of test
scores?
A. {86, 77, 92, 69, 86, 91, 68)
B. {85, 76, 91, 68, 84, 89, 67)
C. {98, 79, 85, 81, 89, 78, 92)
D. {89, 68, 92, 88, 81, 90, 100}
E. {75, 98, 86, 83, 88, 94, 99}