The Two Samples Whose Statistics Are Given in the Table $$\begin{array} { | c | c | c | } \hline n & \text { Mean } & \text { SD } \\\hline 12 & 45 & 6 \\\hline 16 & 41 & 8 \\\hline\end{array}$$

question 57

Multiple Choice

The two samples whose statistics are given in the table are thought to come from populations with
Equal variances. What is the pooled estimate of the population standard deviation? $$\begin{array} { | c | c | c | } \hline n & \text { Mean } & \text { SD } \\\hline 12 & 45 & 6 \\\hline 16 & 41 & 8 \\\hline\end{array}$$

• A) 10
• B) 2.65
• C) 7.14
• D) 7.22
• E) 7

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