Concept explainers
a.
Make the
Find the independent variable that has the strongest correlation with the dependent variable.
Explain whether the strong correlation between some independent variables indicate any problem.
b.
Find the regression equation.
Find the estimated salary for a teacher with 5 years’ experience, a rating by the principal of 60 and no master’s degree.
c.
Perform a global hypothesis test to check whether any of the regression coefficients differ from zero at 0.05 level of significance.
d.
Perform individual tests of each independent variable at 0.05 significance level.
Explain whether any of the independent variable will be eliminated.
e.
Perform the regression analysis by omitting the insignificant random variable.
f.
Find the residuals for the equation of Part (e).
Find a stem-and-leaf plot or a histogram to verify whether the distribution of the residuals is approximately normal.
g.
Plot the residual plot.
Explain whether the plot reveals any violations of assumptions of regression.
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Chapter 14 Solutions
STAT TECH IN BUSINESS & ECON AC
- Glencoe Algebra 1, Student Edition, 9780079039897...AlgebraISBN:9780079039897Author:CarterPublisher:McGraw HillHolt Mcdougal Larson Pre-algebra: Student Edition...AlgebraISBN:9780547587776Author:HOLT MCDOUGALPublisher:HOLT MCDOUGALCalculus For The Life SciencesCalculusISBN:9780321964038Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.Publisher:Pearson Addison Wesley,
- College Algebra (MindTap Course List)AlgebraISBN:9781305652231Author:R. David Gustafson, Jeff HughesPublisher:Cengage Learning
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