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Chapter 3: Q.28 (page 162)

In a scatterplot of the average price of a barrel of oil and the average retail price of a gallon of gas, you expect to see.

(a) very little association.

(b) a weak negative association.

(c) a strong negative association.

(d) a weak positive association.

(e) a strong positive association.

Short Answer

Expert verified

The correct option is E (a strong positive association).

Step by step solution

01

Given Information 

In a scatterplot of the average price of a barrel of oil and the average retail price of a gallon of gas, you expect to see.

02

Explanation

The price of a barrel of oil should immediately impact the price of a gallon of gasoline. For example, If the price of a barrel of oil rises, the price of the product it is used to manufacture should rise as well.

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Most popular questions from this chapter

Bird colonies One of nature’s patterns connects the percent of adult birds in a colony that return from the previous year and the number of new adults that join the colony. Here are data for 13colonies of sparrow-hawks:4

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(a) Make a scatterplot on your calculator.

(b) Describe the form of the relationship. Why is it not linear? Explain why the form of the relationship makes sense.

(c) It does not make sense to describe the variables as either positively associated or negatively associated. Why?

(d) Is the relationship reasonably strong or quite weak? Explain your answer.

The scatterplots below show four sets of real data:

(a) repeats the manatee plot in Figures

(b) shows the number of named tropical storms and the number predicted before the start of hurricane season each year between 1984and 2007by William Gray of Colorado State University;

(c) plots the healing rate in micrometers (millionths of a meter) per hour for the two front limbs of several newts in an experiment; and

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For each graph, estimate the correlation r. Then interpret the value of r in context.

(a)

(b)

(c)

(d)
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