An elementary school teacher has three classes.She finds the following mean and standard deviations for student IQ scores.
She knows she is most effective when the students all have similar IQ levels.Which class is she likely to be most effective with?
A)Class #1
B)Class #2
C)Class #3
D)Classes #1 and #2 equally
E)Classes #1 and #3 equally

Question

An elementary school teacher has three classes.She finds the following mean and standard deviations for student IQ scores. 
She knows she is most effective when the students all have similar IQ levels.Which class is she likely to be most effective with?
A)Class #1 
B)Class #2 
C)Class #3 
D)Classes #1 and #2 equally 
E)Classes #1 and #3 equally

Quizplus · Accepted Answer

Class #2 has the smallest standard deviation, which indicates that the IQ scores are more tightly clustered around the mean. This suggests that the students in Class #2 have more similar IQ levels, and therefore the teacher is likely to be more effective in this class.

An Elementary School Teacher Has Three Classes