CourseWork

Not Rated (0)

$15/per page/

About CourseWork

Levels Tought:
Elementary,Middle School,High School,College,University,PHD

Expertise:
Applied Sciences,Chemistry See all
Applied Sciences,Chemistry,Communications,Economics,Engineering,Environmental science Hide all
Teaching Since: Apr 2017
Last Sign in: 269 Weeks Ago, 6 Days Ago
Questions Answered: 352
Tutorials Posted: 351

Education

  • MBA,PHD in Psychology
    Northwest Florida State College
    Jun-1992 - May-1997

Experience

  • Professor
    Northwest Florida State College,
    Aug-2006 - Nov-2015

Category > Economics Posted 03 May 2017 My Price 9.00

Finding and plotting residuals.

8.1              Finding and plotting residuals. Consider the data on x and y shown in the table.

(a)    Fit the model E(y) = β0 + β1x to the data.

(b)    Calculate the residuals for the model.

(c)    Plot the residuals versus x. Do you detect any trends? If so, what does the pattern suggest about the model?

 

 

8.2              Finding and plotting residuals. Consider the data on x and y shown in the table.

(a)    Fit the model E(y) = β0 + β1x to the data.

(b)    Calculate the residuals for the model.

(c)    Plot the residuals versus x. Do you detect any trends? If so, what does the pattern suggest about the model?

 

 

x

2

4

7

10

12

15

18

20

21

25

y

5

10

12

22

25

27

39

50

47

65

 

 

MINITAB Output for Exercise  8.4

 

8.3              New tire wear tests. Refer to Example 3.2 (p. 120). Recall that a manufacturer of a new tire tested the tire for wear at different pressures with the results shown in the table.

(a)    Fit the straight-line model y = β0 + β1x + ε to the data.

(b)    Calculate the residuals for the model.

(c)    Plot the residuals versus x. Do you detect any trends? If so, what does the pattern suggest about the model?

(d)    Fit the quadratic model y = β0 + β1x  + β2x2 + ε to the data using an available sta- tistical software package. Has the addition of

the quadratic term improved model adequacy?

TIRES

PRESSURE                               MILEAGE

x, pounds per sq. inch                y, thousands

30                                       29.5

30                                       30.2

31                                       32.1

31                                       34.5

32                                       36.3

32                                       35.0

33                                       38.2

33                                       37.6

34                                       37.7

34                                       36.1

35                                       33.6

35                                       34.2

36                                       26.8

36                                       27.4

Answers

CourseWork
Not Rated (0)
Status NEW Posted 03 May 2017 01:05 PM My Price 9.00

Hel-----------lo -----------Sir-----------/Ma-----------dam-----------Tha-----------nk -----------You----------- fo-----------r u-----------sin-----------g S-----------obt-----------ell----------- an-----------d a-----------cqu-----------isi-----------tio-----------n o-----------f m-----------y p-----------ost-----------ed -----------sol-----------uti-----------on.----------- Pl-----------eas-----------e p-----------ing----------- me----------- on----------- ch-----------at -----------I a-----------m o-----------nli-----------ne -----------or -----------inb-----------ox -----------me -----------a m-----------ess-----------age----------- I -----------wil-----------l b-----------e c-----------atc-----------h

Not Rated(0)