Week 10 - Chapter 12b.docx - Chapter 12b Correlation and Simple Regression Analysis • Understand the usefulness of residual analysis to examine the

Week 10 - Chapter 12b.docx - Chapter 12b Correlation and...

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Chapter 12b Correlation and Simple Regression Analysis Understand the usefulness of residual analysis to examine the fit of the regression line and test assumptions underlying the regression analysis Compute and interpret the standard error of the estimate Compute and interpret the coefficient of determination
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Positive because coefficients (time) is negative So answer is -0.279 Test hypotheses and interpret the results about the slope of the regression model
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Unformatted text preview: • • • **always one tail test This the bottom portion of the report what we focus on Two tail test always use a/2 The hypothesis will always compare it to 0 ?? • Estimate values using the regression model • Develop a linear trend line and use it to make forecast • *difficult Calculated t = -1.8516 Answer is a Critical t options for a/2 X = 0.01 t0.005,200= -.601 X = 0.03 t0.025,200= -1.972 T0.05,200= -1.653...
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  • Fall '14
  • IgnacioCastillo

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