Glossary C

- Coding system : Coding system refers to the Brunerian concept referring to a hierarchical arrangement of related categories.

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CODIS (Combined DNA Idex System)

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Codominance is a condition in which two (2) heterozygous but equally powerful alleles produce a phenotype in which both genes are fully and equally expressed. It is a condition in which both alleles of a specific gene contribute to the characteristic that is expressed, as in AB blood type.

Coefficient alpha is a statistic used to determine internal reliability of tests that use interval or ratio scales. It is a generalized method for estimating reliability. Alpha is similar to the KR20 formula, except that it allows items to take on values other than 0 and 1.

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Coefficient of alienation is a term used in correlation and regression analysis that refers to the index of non-association between two (2) variables.

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- Coefficient of correlation (r) : Coefficient of correlation (r) is a mathematical expression indicating the magnitude of correlation between two (2) variables. It is a statistical index ranging from 1.00 to 1.00 that indicates the direction and degree of correlation.

Coefficient of determination, r2 refers to the squared value of a correlation that measures the percentage of variability in one variable that is determined or predicted by its relationship with the other variable. Moreover, Coefficient of determination, r2 is the correlation coefficient squared which gives an estimate of the percentage of variation in Y that is known as a function of knowing X (and vice versa); a statistic computed by squaring the correlation coefficient that specifies the proportion of variation explained.

Coefficient of friction is the ratio between the force needed to overcome friction over the force holding the surfaces together.

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