Find study content
Learning Materials

Discover learning materials by subject, university or textbook.

Explanations

Textbooks

Exams
All Subjects

Anthropology

Archaeology

Architecture

Art and Design

Bengali

Biology

Business Studies

Greek

Chemistry

Chinese

Combined Science

Computer Science

Economics

Engineering

English

English Literature

Environmental Science

French

Geography

German

History

Hospitality and Tourism

Human Geography

Italian

Japanese

Law

Macroeconomics

Marketing

Math

Media Studies

Medicine

Microeconomics

Music

Nursing

Nutrition and Food Science

Physics

Polish

Politics

Psychology

Religious Studies

Sociology

Spanish

Sports Sciences

Translation

All Subjects

Biology

Business Studies

Chemistry

Combined Science

Computer Science

Economics

English

Environmental Science

Geography

History

Math

Physics

Psychology

Sociology

EXAM TYPES

GCSE

IGCSE

AS

A Level

International A Level

University Admissions Tests

GCSE SUBJECTS

GCSE 1

GCSE 2

GCSE 3

GCSE 4

GCSE 5

SOME-TEXT

IGCSE SUBJECTS

IGCSE 1

AS SUBJECTS

AS 1

A Level SUBJECTS

A Level 1

International A Level SUBJECTS

International A Level 1

University Admissions Tests SUBJECTS

University Admissions Tests 1
Features
Features

Discover all of these amazing features with a free account.

Flashcards

Vaia AI

Notes

Study Plans

Study Sets
What’s new?

Flashcards
Study your flashcards with three learning modes.

Study Sets
All of your learning materials stored in one place.

Notes
Create and edit notes or documents.

Study Plans
Organise your studies and prepare for exams.
Resources
Discover

All the hacks around your studies and career - in one place.

Find a job

Find a degree

Student Deals

Magazine

Mobile App
Featured

Magazine
Trusted advice for anyone who wants to ace their studies & career.

Job Board
The largest student job board with the most exciting opportunities.

Vaia Deals
Verified student deals from top brands.

Our App
Discover our mobile app to take your studies anywhere.

Go to App

Learning Materials

Features

Discover

Chapter 4: Q.4.48 (page 173)

a. Find the regression equation for the data points, use the defining formulas in definition 4.4 to obtain $s_{x x} a n d s_{x y}$
b. Graph the regression equation and the data points

Short Answer

Expert verified

(a) $\hat{y} = 2 + x$

(b)

Step by step solution

01

Part(a) Step 1:Given Information

The given data is:

We have to determine the regression equation.

02

Part (a) Step 2: Explanation

The regression equation is:

$\hat{y} = b_{0} + b_{1} x$

where,

$b_{1} = \frac{s_{x y}}{s_{x x}}$

$b_{0} = \bar{y} - b_{1} x$

The table can be obtained as:

$\bar{x} = \frac{\sum_{x}}{n} = 3$

$y = \frac{\sum_{y}}{n} = 5$

$s_{x x} = \sum_{x i^{2}} - \frac{{(\sum_{x_{i}})}^{2}}{n} = 2$

$s_{x y} = \sum_{x i y i} - \frac{(\sum_{x i}) (\sum_{y i})}{n} = 2$

therefore,

$b_{1} = 1$

$b_{0} = 2$

therefore,the regression equation will be

$\hat{y} = b_{0} + b_{1} x = 2 + x$

03

Part (b) Step 1 :Given Information

The given data is:

We have to determine the graph of regression equation and data points

04

Part (b) Step 2: Explanation

On a graph, the regression equation and data points can be represented as follows:

Thus, the regression equation will be:

$\hat{y} = 2.00 + 1.00 x$

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

In Exercise 4.5, we give linear equations. For each equation,

a. find the $y$ -intercept and slope.

b. determine whether the line slopes upward, slopes downward, or is horizontal, without graphing the equation.

c. use two points to graph the equation.

Given equation is,

$y = 4 x + 3$

Determine the linear correlation coefficient by formula and definition.

In Exercise 4.11, we give linear equations. For each equation,

a. find the $y$ -intercept and slope.

b. determine whether the line slopes upward, slopes downward, or is horizontal, without graphing the equation.

c. use two points to graph the equation.

Given equation is,

$y = 2$

A value of $r$ close to -----suggests at most a weak linear relationship between the variables.

Fill in the blanks.

a. In the context of regression, an_______ is a data point that lies far from the regression line, relative to the other data points.

b. In regression analysis, an_______ is a data point where removal causes the regression equation to change considerably:

See all solutions

Recommended explanations on Math Textbooks

Calculus

Read Explanation

Mechanics Maths

Read Explanation

Applied Mathematics

Read Explanation

Logic and Functions

Read Explanation

Statistics

Read Explanation

Geometry

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