The information below compares the final exam grades for 2 biology classes:
Class 1 Class 2
Mean 80.2 81.3
Standard Deviation 12.1 6.7
Number of cases 25 23
What may we conclude? Class 1
a. is more homogeneous.
b. is more heterogeneous.
c. was a better class.
d. had no grade higher than a 90.
Ans: b. is more heterogeneous.
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