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QuizCh11

# QuizCh11 - Total 1 8 3616477.556 490818.184 7...

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Math 350 – Quiz Chapter 11 – Regression Printed Name: Calculators are allowed on this quiz. ..neighbors are not ! Show work for credit. 1 The data below are given for 9 patients with aplastic anemia. Doctors are interested in predicting the number of lymphocytes ( y ) based upon the percentage of reticulocytes ( x ). % reticulocytes 3.6 2.0 0.3 0.3 0.2 3.0 0.0 1.0 2.2 Lymphocytes (per mm 2 ) 1700 3078 1820 2706 2086 2299 676 2088 2013 A 2 pts Fit a regression line relating to the data. ˆ y = ............................................................................................................................ B 2 pts Interpret the slope in the context of this problem. ............................................................................................................................ C 2 pts Test for the statistical signiﬁcance of this regression line using the F test or t test, that is test the hypothesis H 0 : The slope is equal to zero vs. H a : The slope is not zero. Sig. F Mean Square df Sum of Squares Regression Residual
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Unformatted text preview: Total 1 8 3616477.556 490818.184 7 3435727.289 .563 a .368 180750.267 1 180750.267 Model ANOVA b a. Predictors: (Constant), Reticulocytes b. Dependent Variable: Lymphocytes Std. Error B Beta Sig. t Standardized Coefficients Unstandardized Coefficients (Constant) Reticulocytes 1 .563 .607 .224 184.748 112.114 .001 5.437 348.474 1894.818 Model Coefficients a a. Dependent Variable: Lymphocytes Reject H Fail to Reject H Accept H ............................................................................................................................ D 2 pts What does R , the correlation coeﬃcient, indicate in the context of this problem? ............................................................................................................................ E 2 pts What does R 2 mean in the context of this problem? Dr. Emmert Summer 2011 I of I Points Earned of 10...
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