A Researcher Wanted to Determine If Using an Octane Booster

question 36

Multiple Choice

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

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Definitions:

Artificial Intelligence

The simulation of human intelligence by machines, enabling them to learn, reason, perceive, and perform tasks.

Digital Divide

The gap between demographics and regions that have access to modern information and communications technology, and those that don't or have restricted access.

Kiosks

Standalone physical units often used in public places for providing information, services, or for conducting transactions, such as ticket sales or check-ins.

ATMs

Automated Teller Machines, electronic banking outlets that allow people to complete transactions without needing to visit a bank branch.