A Group of Six Individuals with High Blood Pressure Volunteered

Multiple Choice

A group of six individuals with high blood pressure volunteered to test whether petting cats for 10 minutes can alter systolic blood pressure levels. Systolic blood pressures (in millimeters of mercury, Or mmHg) were measured for each subject before and after petting cats for 10 minutes, with the Following results:
$\begin{array} { c c c } \hline \text { Individual } & \text { Before } & \text { After } \\\hline 1 & 149 & 177 \\2 & 175 & 214 \\3 & 194 & 189 \\4 & 186 & 150 \\5 & 180 & 171 \\6 & 164 & 168\end{array}$
Find the 99% confidence interval for the mean reduction in systolic blood pressure.

A) (-47.97, 40.97)
B) (-56.42, 49.42)
C) (-49.31, 46.75)
D) (-53.75, -56.42)