Log out Go to App
Go to App

Learning Materials

Features

Discover

Chapter 3: Q.10 (page 159)

Do heavier people burn more energy? Metabolic rate, the rate at which the body consumes energy, is important in studies of weight gain, dieting, and exercise. We have data on the lean body mass and resting metabolic rate for 12women who are subjects in a study of dieting. Lean body mass, given in kilograms, is a person’s weight leaving out all fat. Metabolic rate is measured in calories burned per 24hours. The researchers believe that lean body mass is an important influence on metabolic rate.

(a) Make a scatterplot on your calculator to examine the researchers’ belief.

(b) Describe the direction, form, and strength of the relationship.

Short Answer

Expert verified

a). Scatter plot:

b). Direction: Positive, Form: Linear, Strenght: Moderate.

Step by step solution

01

Part(a) Step 1: Given Information 

The researchers believe that lean body mass is an important influence on metabolic rate.

02

Part(a) Step 2: Explanation

The horizontal axis represents mass, whereas the vertical axis represents rate.

Scatter plots:

03

Part(b) Step 1: Given Information

The researchers believe that lean body mass is an important influence on metabolic rate.

04

Part(b) Step 2: Explanation

Direction: The direction is positive, Because the scatterplot slopes upwards.

Form: The form is linear,Because there is no curvature in the scatterplot and all points appear to be nearly on a line.

Strength: Moderate, due to the fact that the points are not too far apart yet not too close together.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Start your free trial

Over 30 million students worldwide already upgrade their learning with Vaia!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

Nahya infant weights A study of nutrition in developing countries collected data from the Egyptian

village of Nahya. Here are the mean weights (in kilograms) for 170 infants in Nahya who were

weighed each month during their first year of life:

A hasty user of statistics enters the data into software and computes the least-squares line without plotting the data. The result is weight=4.88+0.267(age) A residual plot is shown below. Would it be appropriate to use this regression line to predict y from x? Justify your answer.

How much gas? Refer to Exercise 40. Would it be appropriate to use the regression line to predict Joan’s natural-gas consumption in a future month with an average temperature of 65°F? Justify your answer

The National Student Loan Survey provides data on the amount of debt for recent college graduates, their current income, and how stressed they feel about college debt. A sociologist looks at the data with the goal of using the amount of debt and income to explain the stress caused by college debt.

What form does the relationship take? Why are there two clusters of points?

Outsourcing by airlines Exercise 5 (page 158) gives data for 14 airlines on the percent of major maintenance outsourced and the percent of flight delays blamed on the airline.

(a) Make a scatterplot with outsourcing percent as x and delay percent as y Hawaiian Airlines is a high outlier in the y-direction. Because several other airlines have similar values of x the influence of this outlier is unclear without actual calculation.

(b) Find the correlation rwith and without Hawaiian Airlines. How influential is the outlier for correlation?

(c) Find the least-squares line for predicting yfrom xwith and without Hawaiian Airlines. Draw both lines on your scatterplot. Use both lines to predict the percent of delays blamed on an airline that has outsourced 76%of its major maintenance. How influential is the outlier for the least-squares line?
See all solutions

Recommended explanations on Math Textbooks

Mechanics Maths

Read Explanation

Calculus

Read Explanation

Logic and Functions

Read Explanation

Statistics

Read Explanation

Applied Mathematics

Read Explanation

Pure Maths

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.

Sign-up for free