×
Get Full Access to Stats Modeling The World - 4 Edition - Chapter 26 - Problem 27
Get Full Access to Stats Modeling The World - 4 Edition - Chapter 26 - Problem 27

×

# Fuel economy A consumer organization has reported test data for 50 car models. We will ISBN: 9780321854018 481

## Solution for problem 27 Chapter 26

Stats Modeling the World | 4th Edition

• Textbook Solutions
• 2901 Step-by-step solutions solved by professors and subject experts
• Get 24/7 help from StudySoup virtual teaching assistants Stats Modeling the World | 4th Edition

4 5 1 270 Reviews
10
0
Problem 27

Fuel economy A consumer organization has reported test data for 50 car models. We will examine the association between the weight of the car (in thousands of pounds) and the fuel efficiency (in miles per gallon). Here are the scatterplot, summary statistics, and regression analysis: Variable Count Mean StdDev MPG 50 25.0200 4.83394 wt/1000 50 2.88780 0.511656 Dependent variable is: MPG R-squared = 75.6% s = 2.413 with 50 - 2 = 48 df Variable Coefficient SE(Coeff) t-ratio P-value Intercept 48.7393 1.976 24.7 0.0001 Weight -8.21362 0.6738 -12.2 0.0001 a) Is there strong evidence of an association between the weight of a car and its gas mileage? Write an appropriate hypothesis. b) Are the assumptions for regression satisfied? c) Test your hypothesis and state your conclusion.

Step-by-Step Solution:
Step 1 of 3

Components of Statistics Collecting and analyzing data in order to create a reliable sample. ● Population: The units involved in an issue an individual is interested in investigating. Typically, entire populations are too large to measure. ○ Students at the University of Illinois are a population. ● Sample: a smaller set of individual units selected from the investigation.Sampling solves the issue of large numbers, but it will also cause uncertainty. Aspects of the sample do not always correlate with the vast majority. ○ Individuals that are in statistics classes are a sample of the students at the University. ● Statistics: This is where the sample is used. The purpose of statistics is better understand the populati

Step 2 of 3

Step 3 of 3

##### ISBN: 9780321854018

This full solution covers the following key subjects: . This expansive textbook survival guide covers 31 chapters, and 1357 solutions. This textbook survival guide was created for the textbook: Stats Modeling the World, edition: 4. Since the solution to 27 from 26 chapter was answered, more than 234 students have viewed the full step-by-step answer. Stats Modeling the World was written by and is associated to the ISBN: 9780321854018. The answer to “Fuel economy A consumer organization has reported test data for 50 car models. We will examine the association between the weight of the car (in thousands of pounds) and the fuel efficiency (in miles per gallon). Here are the scatterplot, summary statistics, and regression analysis: Variable Count Mean StdDev MPG 50 25.0200 4.83394 wt/1000 50 2.88780 0.511656 Dependent variable is: MPG R-squared = 75.6% s = 2.413 with 50 - 2 = 48 df Variable Coefficient SE(Coeff) t-ratio P-value Intercept 48.7393 1.976 24.7 0.0001 Weight -8.21362 0.6738 -12.2 0.0001 a) Is there strong evidence of an association between the weight of a car and its gas mileage? Write an appropriate hypothesis. b) Are the assumptions for regression satisfied? c) Test your hypothesis and state your conclusion.” is broken down into a number of easy to follow steps, and 126 words. The full step-by-step solution to problem: 27 from chapter: 26 was answered by , our top Statistics solution expert on 03/16/18, 04:57PM.

Unlock Textbook Solution