The Systolic Blood Pressure Readings of Ten Subjects Before and After

Essay

The systolic blood pressure readings of ten subjects before and after following a particular diet for a month are shown in the table. Use a significance level of 0.01 to test the claim that the diet has no effect on systolic blood pressure. $$\begin{array} { l l l l l l l l l l l l } \text { Subject } & & \text { A } & \text { B } & \text { C } & \text { D } & \text { E } & \text { F } & \text { G } & \text { H } & \text { I } & \text { J } \\\hline \text { Before } & & 175 & 192 & 167 & 180 & 161 & 203 & 185 & 176 & 204 & 146 \\\hline \text { After } & & 160 & 190 & 170 & 180 & 153 & 197 & 191 & 174 & 192&150\end{array}$$