Eight Subjects Were Weighed Before and After a New Three-Week $0.05$

Essay

Eight subjects were weighed before and after a new three-week "healthy" diet. At the $0.05$ level of significance, can it be concluded that a difference in weight resul (Weights are in pounds.)
$\begin{array}{l|cccccccc}\text { Subject } & \text { A } & \text { B } & \text { C } & \text { D } & \text { E } & \text { F } & \text { G } & \text { H } \\\hline \text { Before } & 148 & 185 & 176 & 170 & 194 & 155 & 167 & 184 \\\text { After } & 151 & 189 & 169 & 171 & 189 & 153 & 168 & 177\end{array}$