A) 331
B) 1

Multiple Choice

$$\begin{array}{l}\text { In testing the equality of the two means below, what is the test statistic? (Use the equal variances }\\\begin{array} { | l | c | c | } \hline & \text { Sample 1 } & \text { Sample 2 } \\\hline \text { Sample size } & 12 & 9 \\\hline \text { Sample mean } & 115 & 80 \\\hline \text { Sample variance } & 700 & 400 \\\hline\end{array}\end{array}$$

A) 3.31
B) 1.75
C) 0.31
D) 2.31