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Chapter 3: Q 3. (page 171)

Heavy backpacks Ninth-grade students at the Webb Schools go on a

backpacking trip each fall. Students are divided into hiking groups of size 8 by selecting names from a hat. Before leaving, students and their backpacks are weighed. The data here are from one hiking group. Make a scatterplot by hand that shows how to backpack weight relates to body weight.

Short Answer

Expert verified

There is a positive relationship between the two variables.

Step by step solution

01

Given information

The data set is:

Body weight120187109103131165158116
Backpack weight2630262429353128
02

Explanation

The scatter plot for the provided set can be constructed as:

The above-drawn graph demonstrates that the two variables have a positive association.

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Most popular questions from this chapter

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a. Interpret the slope of the regression line.

b. Does the value of the y intercept have meaning in this context? If so, interpret the y intercept. If not, explain why.

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b. Correlation will increase, and the slope will stay the same.

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a. Interpret the slope of the regression line.

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Correlation isn鈥檛 everything Marc and Rob are both high school English teachers. Students think that Rob is a harder grader, so Rob and Marc decide to grade the same 10 essays and see how their scores compare. The correlation is r=0.98 but Rob鈥檚 scores are always lower than Marc鈥檚. Draw a possible scatterplot that illustrates this situation.
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