A group of eight individuals with high cholesterol levels
Chapter 6, Problem 10E(choose chapter or problem)
A group of eight individuals with high cholesterol levels were given a new drug that was designed to lower cholesterol levels. Cholesterol levels, in mg/dL, were measured before and after treatment for each individual, with the following results:
\(\begin{array}{ccc}
\hline \text { Subject } & \text { Before } & \text { After } \\
\hline 1 & 283 & 215 \\
2 & 299 & 206 \\
3 & 274 & 187 \\
4 & 284 & 212 \\
5 & 248 & 178 \\
6 & 275 & 212 \\
7 & 293 & 192 \\
8 & 277 & 196 \\
\hline
\end{array}\)
a. Can you conclude that the mean cholesterol level after treatment is less than the mean before treatment?
b. Can you conclude that the reduction in mean cholesterol level after treatment is greater than 75 mg/dL?
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