A Group of Six Individuals with High Cholesterol Levels Were

A group of six individuals with high cholesterol levels were given a new diet designed to lower cholesterol levels. Cholesterol levels, in milligrams per deciliter, were measured before and after the
Implementation of the diet for each individual, with the following results:
$\begin{array} { c c c } \hline \text { Individual } & \text { Before } & \text { After } \\\hline 1 & 227 & 208 \\2 & 239 & 208 \\3 & 255 & 208 \\4 & 242 & 187 \\5 & 240 & 212 \\6 & 241 & 196\end{array}$
Find the 98% confidence interval for the mean reduction in cholesterol level.

A) (15.23, 59.77)
B) (17.85, 58.83)
C) (16.17, 15.23)
D) (18.79, 56.21)