The Following MINITAB Output Display Presents a 95% Confidence Interval

question 20

Multiple Choice

The following MINITAB output display presents a 95% confidence interval for the difference between two means.
$\begin{array} { l r r r r r } & \mathrm { N } & \text { Mean } & \text { StDev } & \text { SE Mean } & \\\text { A } & 15 & 144.384 & 25.413 & 6.562 & \\\text { B } & 9 & 168.966 & 22.669 & 7.556 & \\\text { Difference } = \text { mu (A) } & - \text { mu (B) } & & & \\\text { Estimate for difference: } & - 24.582 & & & \\\text { 95\% CI for difference: } & ( - 44.197 , - 4.967 ) & & \text { DF } = 19\end{array}$
Fill in the blanks: We are 95% confident that the difference in the means is between ______
And ______.

• A) 9, 15
• B) 144.384, 168.966
• C) 0, 19
• D) -44.197, -4.967

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