Submitted by: Submitted by plausible
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Category: Science and Technology
Date Submitted: 02/03/2011 02:27 PM
MINITAB Exercise #1
Data Set:
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a. Plot of DISPINC against Year
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b. Plot of PERSCONS against Year
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c. Descriptive Statistics
Descriptive Statistics: DISPINC, PERSCONS, DUMMY
Variable N Mean StDev Minimum Maximum
DISPINC 10 879.2 86.4 751.6 1015.7
PERSCONS 10 793.4 85.0 672.1 927.6
DUMMY 10 0.400 0.516 0.000000000 1.000
d/e. Additional of New Variables
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f. Regression Model of PERCONS versus DISPINC and INCDUM
Regression Analysis: PERSCONS versus DISPINC, INCDUM
The regression equation is
PERSCONS = 22.0 + 0.867 DISPINC + 0.0226 INCDUM
Predictor Coef SE Coef T P
Constant 22.02 35.45 0.62 0.554
DISPINC 0.86743 0.04303 20.16 0.000
INCDUM 0.022637 0.007461 3.03 0.019
S = 5.75637 R-Sq = 99.6% R-Sq(adj) = 99.5%
Analysis of Variance
Source DF SS MS F P
Regression 2 64740 32370 976.89 0.000
Residual Error 7 232 33
Total 9 64972
g. Regression Model of PERCONS versus DISPINC, INCDUM, and CONSDUM
Regression Analysis: PERSCONS versus DISPINC, INCDUM, CONSDUM
The regression equation is
PERSCONS = 33.0 + 0.854 DISPINC - 1.09 INCDUM + 1.22 CONSDUM
Predictor Coef SE Coef T P
Constant 32.96 35.06 0.94 0.383
DISPINC 0.85419 0.04255 20.08 0.000
INCDUM -1.0906 0.8756 -1.25 0.259
CONSDUM 1.2216 0.9608 1.27 0.251
S = 5.51841 R-Sq = 99.7% R-Sq(adj) = 99.6%
Analysis of Variance
Source DF SS MS F P
Regression 3 64789 21596 709.18 0.000
Residual Error 6 183 30
Total 9 64972
Full MINITAB session output on following pages