Refer to the Information Provided in Table 12 -An Elementary School Teacher Has Three Classes

Refer to the information provided in Table 12.1 below to answer the questions that follow.
Table 12.1:
2001 survey of 1,000 randomly selected adult residents of Seattle, Years of schooling by whether or not one agrees with the statement,
"Seattle should require the registration of hand guns with the city police department."
$$\begin{array} { l | c c c c c c } \text { Years }& \text { Strongly } && &{ \text { Strongly } } \\ \text { of School }&\text { Agree } & \text { Agree } & \text { Disagree } & \text { Disagree } & \text { Total } & ( \mathrm { N } ) \\\hline \text { Under } 8 & 30 \% & 25 \% & 30 \% & 15 \% & 100 \% & ( 100 ) \\8 - 11 & 35 \% & 20 \% & 30 \% & 15 \% & 100 \% & ( 100 ) \\12 & 40 \% & 30 \% & 15 \% & 5 \% & 100 \% & ( 200 ) \\13 - 15 & 50 \% & 25 \% & 20 \% & 5 \% & 100 \% & ( 300 ) \\16 & 60 \% & 25 \% & 10 \% & 5 \% & 100 \% & ( 200 ) \\17 \text { or more } & 80 \% & 10 \% & 5 \% & 5 \% & 100 \% & ( 100 ) \end{array}$$
-An elementary school teacher has three classes. She finds the following mean and standard deviations for student I.Q. scores. $$\begin{array} { l l c } & \text { Mean } & \text { Standard Deviation } \\\hline \text { Class \#1 } & 106 & 32 \\\hline \text { Class \#2 } & 104 & 9 \\\text { Class \#3 } & 110 & 16 \\\hline\end{array}$$ She knows she is more effective if the students are at similar ability levels and the I.Q. measures ability level in this situation. Which class is she likely to be most effective with? [NOTE: I.Q. 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) All classes equally