BIOS 603

Correlation and Linear Regression

Learning Objective 31
1. In a group of 100 middle aged men the correlation between age and systolic blood pressure is .21. Test the hypothesis that the correlation does not equal zero.

2. In another group of 200 people the correlation is .10. Test the hypothesis that the correlation in this group is less than the population value of .20.

Answer

Learning Objective 32

For 1406 subjects in the Framingham Heart study we are predicting cholesterol from age and cholestereol from systolic blood pressure. In each case use the F test and the t test to determine if there is a a significant realtionship between the two variables.

Age   Source           SS      df     MS
      Regression    19137.64     1   19137.64
      Residual    2991506.75  1404    2130.70

      Term       Coef    s.e.
      Intercept  194.25
      Age           .77  .26

SBP   Source          SS       df         MS
      Regression    38699.93     1      38699.93
      Residual    2971944.50  1404       2116.77

      Term         Coef   s.e.
      Intercept    206.97
      SBP             .19  .04

Answer

Learning Objective 33
Answer
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BIOS 603

Correlation and Linear Regression

Learning Objective 31

Learning Objective 32

Learning Objective 33