Methods of Correlation and Regression Analysis, Linear and Curvilinear

By Mordecai Ezekiel; Karl A. Fox | Go to book overview

APPENDIX 1
Glossary and important equations

Glossary

The Greek and Roman letters used as symbols in this text, and the most important of the other symbols, are as follows:

 Mx (Roman) = arithmetic mean of X. σ (small sigma) = standard deviation in the universe. Σ (capital sigma) = sum of the items specified. n (Roman) = number of observations in a sample. b (Roman) = coefficient of regression. ƒ() (Roman) = function of the variable in the parentheses. sx (Roman) = standard deviation in a sample. r (Roman) = coefficient of correlation in a sample. i (Roman) = index of correlation (curvilinear relations). S (Roman) = standard error of estimate. m (Roman) = number of constants in the regression equation. z (Roman) = residual, or difference between observed and     estimated values of a dependent variable. R (Roman) = coefficient of multiple correlation. β (small beta) = "beta" coefficient of regression, in terms of     standard deviation units; also universe coeffi-     cient of regression. I (Roman) = index of multiple (curvilinear) correlation. η (small eta) = correlation ratio. θ (small theta) = function of (used here for the Bruce adjustment     function). Δ (capital delta) = arbitrary symbol. π (small pi) = arbitrary symbol. Φ (capital phi) = function of. X, Y (Roman) = variables, as observed.

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