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Chapter 3: Q.27 (page 162)

You have data for many years on the average price of a barrel of oil and the average retail price of a gallon of unleaded regular gasoline. If you want to see how well the price of oil predicts the price of gas, then you should make a scatterplot with ______ as the explanatory variable.

(a) the price of oil

(b) the price of gas

(c) the year

(d) either oil price or gas price

(e) time

Short Answer

Expert verified

The correct option is A (the price of oil).

Step by step solution

01

Given Information

You have data for many years on the average price of a barrel of oil and the average retail price of a gallon of unleaded regular gasoline. If you want to see how well the price of oil predicts the price of gas, then you should make a scatterplot with ______ as the explanatory variable.

02

Explanation

Make the variable you want to be the "predictor" the explanatory variable if you want to examine how well one variable predicts another in a scatterplot.

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Most popular questions from this chapter

Marijuana and traffic accidents (1.1) Researchers in New Zealand interviewed 907 drivers at age 21

They had data on traffic accidents and they asked the drivers about marijuana use. Here are data on the numbers of accidents caused by these drivers at age 19, broken down by marijuana use at the same age

(a) Make a graph that displays the accident rate for each class. Is there evidence of an association

between marijuana use and traffic accidents?

(b) Explain why we can鈥檛 conclude that marijuana use causes accidents.

Beer and blood alcohol The example on page 182describes a study in which adults drank different amounts of beer. The response variable was their blood alcohol content (BAC). BAC for the same amount of beer might depend on other facts about the subjects. Name two other variables that could account for the fact that r2=0.80.

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(a) Find the equation of the least-squares regression line for predicting the husband鈥檚 height from the wife鈥檚 height. Show your work.

(b) Use your regression line to predict the height of the husband of a woman who is 67inches tall. Explain why you could have given this result without doing the calculation

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(a) Describe the direction, form, and strength of the relationship between number of new sparrow-hawks in a colony and percent of returning adults.

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Oil and residuals The Trans-Alaska Oil Pipeline is a tube that is formed from 1/2-inch-thick steel and carries oil across 800miles of sensitive arctic and subarctic terrain. The pipe segments and the welds that join them were carefully examined before installation. How accurate are field measurements of the depth of small defects? The figure below compares the results of measurements on 100defects made in the field with measurements of the same defects made in the laboratory. The line y=x is drawn on the scatterplot.

(a) Describe the overall pattern you see in the scatterplot, as well as any deviations from that pattern.

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