The following output from MINITAB presents a confidence interval for the mean difference between matched pairs
$\begin{array} { r r r r r }
& \mathrm { N } & \text { Mean } & \text { StDev } & \text { SEMean } \
\text { Difference } & 20 & 8.7658 & 2.1867 & 0.488961
\end{array}$
95 % CI for mean difference: (7.74239,9.78921)
Fill in the blanks: We are 95% confident that the mean difference is between ______ and ----------.
A) 6.5791,10.9525
B) 0,8.7658
C) 7.74239,9.78921
D) 0.488961,2.1867

Question

The following output from MINITAB presents a confidence interval for the mean difference between matched pairs
$\begin{array} { r r r r r } 
& \mathrm { N } & \text { Mean } & \text { StDev } & \text { SEMean } \
\text { Difference } & 20 & 8.7658 & 2.1867 & 0.488961
\end{array}$
 95 %  CI for mean difference:  (7.74239,9.78921) 
Fill in the blanks: We are 95% confident that the mean difference is between ______ and ----------.
A)  6.5791,10.9525 
B)  0,8.7658 
C)  7.74239,9.78921 
D)  0.488961,2.1867

Quizplus · Accepted Answer

The confidence interval provided directly in the question is (7.74239,9.78921), which matches option C.

The Following Output from MINITAB Presents a Confidence Interval for the Mean