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Unformatted text preview: IPHY 2800 Lecture 10 RESULTS OF EXAMINATION 1 CORRElATION INTRODUCfION DEFINITION KARL PEARSON COEFFIOENT STRENGTH AND DIRECfION USE NOT CAUSE AND EFFECf SCATTERGRAM CALCUI.ATION DEFINITIOAL FORMULA OTHER FORMUlAS INTERPREfA TION COEFFICIENT OF DETERMINATION SIGNIFICANCE IPHY 2800 Lecture 11 PREDICTION (BIVARIATE REGRESSION) LINE OF BEST FIT Y=bX+C b=slope C=Y intercept CALCULATE b AND C EXAMPLE PREDICTION ERROR STANDARD ERROR OF ESTIMATE FORMULA EXAMPLE INTERPRETATION MULTIPLE REGRESSION INTRODUCTION GENERAL EXAMPLES CONSIDERATIONS SPECIFIC EXAMPLE SOME ISSUES NUMBER OF SUBJECTS OUTLIERS HOMOSCEDASTICITY CROSS VALIDATION IPHY2800 PRACTICE QUESTIONS AND EXAMPLES FOR LECTURES 13 thru 16 1. A nationally standardized test measuring positive attitude toward statistics has a mean of75. If25 randomly selected IPHY majors took the test and their mean score was 81 and the standard deviation of their scores was 14, are they like the population or do they have a statistically significantly better attitude toward statistics? (use alpha = .05) 4. On the last test in this class the 68 male's mean was 29.17 with a standard deviation of 3.05 and the 68 female's mean score was 28.52 with a standard deviation of2.97. Did the...
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 Spring '08
 DECKER,MIK

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