Regression Analysi1

# Regression Analysi1 - -9.855-0.84 X 85 40.0 75.000 75.943...

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80 70 60 50 40 30 20 10 0 120 100 80 60 40 20 0 Number of hours studied per wee Average exam grade Scatterplot of Average exam grade vs Number of hours studied per wee Regression Analysis: Average exam gra versus Number of hours The regression equation is Average exam grade = 77.3 - 0.0340 Number of hours studied per wee Predictor Coef SE Coef T P Constant 77.3027 0.9670 79.94 0.000 Number of hours studied per wee -0.03400 0.05991 -0.57 0.571 S = 12.3168 R-Sq = 0.1% R-Sq(adj) = 0.0% Analysis of Variance Source DF SS MS F P Regression 1 48.9 48.9 0.32 0.571 Residual Error 395 59922.8 151.7 Total 396 59971.6 Unusual Observations Number of hours studied Average Obs per wee exam grade Fit SE Fit Residual St Resid 1 50.0 80.000 75.603 2.335 4.397 0.36 X 10 6.0 0.900 77.099 0.728 -76.199 -6.20R 16 6.0 0.800 77.099 0.728 -76.299 -6.21R 25 7.0 121.280 77.065 0.698 44.215 3.60R 46 5.0 40.000 77.133 0.761 -37.133 -3.02R

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53 40.0 78.000 75.943 1.765 2.057 0.17 X 59 72.0 65.000 74.855 3.623
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Unformatted text preview: -9.855 -0.84 X 85 40.0 75.000 75.943 1.765 -0.943 -0.08 X 86 20.0 40.000 76.623 0.767 -36.623 -2.98R 96 40.0 75.000 75.943 1.765 -0.943 -0.08 X 149 44.0 65.000 75.807 1.991 -10.807 -0.89 X 171 40.0 81.000 75.943 1.765 5.057 0.41 X 178 40.0 84.000 75.943 1.765 8.057 0.66 X 179 40.0 77.000 75.943 1.765 1.057 0.09 X 193 42.0 65.000 75.875 1.877 -10.875 -0.89 X 204 40.0 95.000 75.943 1.765 19.057 1.56 X 210 40.0 83.125 75.943 1.765 7.182 0.59 X 211 40.0 78.000 75.943 1.765 2.057 0.17 X 274 30.0 50.000 76.283 1.222 -26.283 -2.14R 300 40.0 80.000 75.943 1.765 4.057 0.33 X 333 40.0 90.000 75.943 1.765 14.057 1.15 X 336 40.0 55.000 75.943 1.765 -20.943 -1.72 X 345 40.0 84.000 75.943 1.765 8.057 0.66 X 359 5.0 45.000 77.133 0.761 -32.133 -2.61R 397 10.0 115.000 76.963 0.635 38.037 3.09R R denotes an observation with a large standardized residual. X denotes an observation whose X value gives it large leverage....
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## This note was uploaded on 11/15/2010 for the course ECO 6416 taught by Professor Staff during the Spring '08 term at University of Central Florida.

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Regression Analysi1 - -9.855-0.84 X 85 40.0 75.000 75.943...

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