Introduction to Probability and Statistics
14th Edition
ISBN: 9781133103752
Author: Mendenhall, William
Publisher: Cengage Learning
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Chapter 12.6, Problem 12.34E
To determine
To explain: whether any regression assumptions have been violated or not.
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An agribusiness performed a regression of wheat yield (bushels per acre) using observations on 21 test plots with four predictors (rainfall, fertilizer, soil acidity, hours of sun). The standard error was 1.02 bushels.
The local utility company surveys 12 randomly selected customers. For each survey participant, the
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Bill 13.45 +4.39*Size
Coefficients Estimate Std. Error
(Intercept) 13.45
Size
4.39
0.54
0.2
We are 90% confident that the mean annual electric bill increases by between 4.028✔ dollars and
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The service regresses the number of complaints lodged against an employee last year on the hourly wage of the employee for the year. The analyst ran a simple linear regression shown below.
Table 7: Model Summary
Model
R
R Square
Adjusted R Square
Std. Error of the Estimate
1
.854a
.730
.695
6.6235
a. Predictors: (Constant), Hourly Wage
Table 8: ANOVA
ANOVAb
Model
Sum of Squares
df
Mean Square
F
Sig.
1
Regression
1918.458
1
1918.458
129.783
.000a
Residual
709.567
48
14.782
Total
2628.025
49
a. Predictors: (Constant), Hourly Wage
b. Dependent Variable: Number of Complaints
Table 9: Coefficients
Coefficientsa
Model
Unstandardized Coefficients
Standardized Coefficients
t
Sig.
B
Std. Error
Beta
1
(Constant)
20.2
4.357
4.636
.000
Hourly Wage
-1.20
.088
-.946
-13.636
.000
a. Dependent Variable: Number of…
Chapter 12 Solutions
Introduction to Probability and Statistics
Ch. 12.4 - Prob. 12.1ECh. 12.4 - Prob. 12.2ECh. 12.4 - Prob. 12.3ECh. 12.4 - Prob. 12.4ECh. 12.4 - Prob. 12.5ECh. 12.4 - You are given five points with these coordinates:...Ch. 12.4 - Prob. 12.7ECh. 12.4 - Prob. 12.8ECh. 12.4 - Prob. 12.9ECh. 12.4 - Prob. 12.10E
Ch. 12.4 - Prob. 12.11ECh. 12.4 - Prob. 12.12ECh. 12.4 - Prob. 12.13ECh. 12.4 - Prob. 12.14ECh. 12.4 - Prob. 12.15ECh. 12.4 - Prob. 12.16ECh. 12.4 - Prob. 12.17ECh. 12.5 - Prob. 12.19ECh. 12.5 - Prob. 12.20ECh. 12.5 - Prob. 12.21ECh. 12.5 - Prob. 12.22ECh. 12.5 - Prob. 12.23ECh. 12.5 - Prob. 12.24ECh. 12.5 - Professor Asimov, continued Refer to thedata in...Ch. 12.5 - Prob. 12.26ECh. 12.5 - Prob. 12.27ECh. 12.5 - Prob. 12.28ECh. 12.5 - Prob. 12.29ECh. 12.5 - Prob. 12.30ECh. 12.6 - Prob. 12.34ECh. 12.6 - Prob. 12.35ECh. 12.6 - Prob. 12.36ECh. 12.6 - Prob. 12.37ECh. 12.6 - Prob. 12.38ECh. 12.7 - Refer to Exercise 12.7. Portions of the MINITAB...Ch. 12.7 - Prob. 12.41ECh. 12.7 - Prob. 12.42ECh. 12.7 - Prob. 12.43ECh. 12.7 - Prob. 12.44ECh. 12.7 - Prob. 12.45ECh. 12.7 - Prob. 12.46ECh. 12.8 - Prob. 12.50ECh. 12.8 - Prob. 12.51ECh. 12.8 - Prob. 12.52ECh. 12.8 - Prob. 12.53ECh. 12.8 - Prob. 12.55ECh. 12.8 - Prob. 12.56ECh. 12.8 - Prob. 12.58ECh. 12.8 - Baseball Stats Does a team’s batting average...Ch. 12 - Prob. 12.62SECh. 12 - Prob. 12.63SECh. 12 - Prob. 12.65SECh. 12 - Prob. 12.66SECh. 12 - Prob. 12.67SECh. 12 - Tennis, Anyone? If you play tennis, you know that...Ch. 12 - Prob. 12.69SECh. 12 - Prob. 12.70SECh. 12 - Prob. 12.71SECh. 12 - Movie Reviews How many weeks cana movie run and...Ch. 12 - In addition to increasingly large bounds onerror,...Ch. 12 - Prob. 12.74SECh. 12 - Prob. 12.76SECh. 12 - Prob. 1CSCh. 12 - Prob. 2CSCh. 12 - Prob. 3CS
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- Find the equation of the regression line for the following data set. x 1 2 3 y 0 3 4arrow_forwardThe service regresses the number of complaints lodged against an employee last year on the hourly wage of the employee for the year. The analyst ran a simple linear regression shown below. Table 7: Model Summary Model R R Square Adjusted R Square Std. Error of the Estimate 1 .854a .730 .695 6.6235 a. Predictors: (Constant), Hourly Wage Table 8: ANOVA ANOVAb Model Sum of Squares df Mean Square F Sig. 1 Regression 1918.458 1 1918.458 129.783 .000a Residual 709.567 48 14.782 Total 2628.025 49 a. Predictors: (Constant), Hourly Wage b. Dependent Variable: Number of Complaints Table 9: Coefficients Coefficientsa Model Unstandardized Coefficients Standardized Coefficients t Sig. B Std. Error Beta 1 (Constant) 20.2 4.357 4.636 .000 Hourly Wage -1.20 .088 -.946 -13.636 .000 a. Dependent Variable: Number of…arrow_forward
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