A researcher wanted to determine if using an octane booster would increase gasoline mileage. A random
sample of seven cars was selected; the cars were driven for two weeks without the booster and two weeks
with the booster.
$$\begin{array} { | l | l | }
\hline \text { Miles / Gal Without } & \text { Miles / Gal With } \
\hline 21.2 & 23.8 \
\hline 25.4 & 25.6 \
\hline 20.9 & 22.4 \
\hline 27.6 & 28.3 \
\hline 22.8 & 24.5 \
\hline 27.3 & 28.8 \
\hline 23.4 & 25.2 \
\hline
\end{array}$$
-Determine the mean of the difference.
A) -0.96
B) -6.3
C) 1.43
D) -1.43

Question

A researcher wanted to determine if using an octane booster would increase gasoline mileage. A random
sample of seven cars was selected; the cars were driven for two weeks without the booster and two weeks
with the booster.
 $$\begin{array} { | l | l | } 
\hline \text { Miles / Gal Without } & \text { Miles / Gal With } \
\hline 21.2 & 23.8 \
\hline 25.4 & 25.6 \
\hline 20.9 & 22.4 \
\hline 27.6 & 28.3 \
\hline 22.8 & 24.5 \
\hline 27.3 & 28.8 \
\hline 23.4 & 25.2 \
\hline
\end{array}$$
-Determine the mean of the difference.
A) -0.96
B) -6.3
C) 1.43
D) -1.43

Quizplus · Accepted Answer

The Answer of A researcher wanted to determine if using an octane booster would increase gasoline mileage. A random
sample of seven cars was selected; the cars were driven for two weeks without the booster and two weeks
with the booster.
 $$\begin{array} { | l | l | } 
\hline \text { Miles / Gal Without } & \text { Miles / Gal With } \
\hline 21.2 & 23.8 \
\hline 25.4 & 25.6 \
\hline 20.9 & 22.4 \
\hline 27.6 & 28.3 \
\hline 22.8 & 24.5 \
\hline 27.3 & 28.8 \
\hline 23.4 & 25.2 \
\hline
\end{array}$$
-Determine the mean of the difference.
A) -0.96
B) -6.3
C) 1.43
D) -1.43

A Researcher Wanted to Determine If Using an Octane Booster