An elementary school teacher has three classes. She finds the following mean and standard deviations for student IQ scores.

An elementary school teacher has three classes. She finds the following mean and standard deviations for student IQ scores.

An elementary school teacher has three classes. She finds the following mean and standard deviations for student IQ scores.


                  Mean Standard Deviation
Class #1          106                    32
Class #2          104                     9
Class #3          110                    16

She knows she is more effective if the students are at similar ability levels and that IQ measures ability level in this situation. Which class is she likely to be most effective with? [NOTE: IQ scores for the general population range from about 70 to 130 with a mean of 100].


A. Class #1
 
B. Class #2


C. Class #3


D. Classes #1 and #2 equally


E. Classes #1 and #3 equally

  Answer Key: B