The Following MINITAB Output Display Presents a 95% Confidence Interval

question 23

Multiple Choice

The following MINITAB output display presents a 95% confidence interval for the difference between two means. $\begin{array}{rrrrc} & \mathrm{N} & \text { Mean } & \text { StDev } & \text { SE Mean } \\\mathrm{A} & 9 & 55.539 & 23.660 & 7.887 \\\mathrm{~B} & 7 & 89.948 & 25.488 & 9.634\end{array}$

$\text { What is the point estimate of } \mu _ { 1 } - \mu _ { 2 } ?$

• A) -34.409
• B) 89.948
• C) 13
• D) -48.804

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