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Date: 20-4-2021
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Date: 20-4-2021
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Date: 22-4-2021
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Given a curved regression, the correlation index is defined by
(1) |
where and are the standard deviations of the data points and the estimates given by the regression line (Kenney and Keeping 1962, p. 293). Unfortunately, the quantity appears not to be defined by Kenney and Keeping (1962, p. 293). Then
(2) |
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(3) |
where is the variance of the observed s about the best-fitting curved line (Kenney and Keeping 1962, p. 293).
REFERENCES:
Kenney, J. F. and Keeping, E. S. Mathematics of Statistics, Pt. 1, 3rd ed. Princeton, NJ: Van Nostrand, 1962.
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