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Unformatted text preview: • Fit a simple linear regression, relating the log of the standard deviation to the log of the mean • The regression coefficient of the log of the mean is an estimate of β Example  Bovine Growth Hormone Bovine Growth Hormone Data 10 20 30 40 50 60 70 50 100 150 200 250 300 350 400 450 500 Mean Std Dev Example  Bovine Growth Hormone ln(mean) ln(sd) 5.7807 3.6687 6.0684 4.0993 5.7900 3.6661 5.7621 3.9703 5.7838 3.8351 5.7930 3.7612 4.9972 3.1946 5.3799 3.4751 4.9416 2.9755 5.0239 3.4340 4.9904 3.0910 5.0239 3.0204 Coefficients Standard Error Intercept1.0553 0.5373 ln(mean) 0.8396 0.0984 Estimated β = .84 ≈ 1, A logarithmic transformation on data should have approximately constant variance...
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 Fall '08
 Staff
 Statistics, Normal Distribution, Standard Deviation, Variance, Bovine growth hormone

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