A nuclear stress test is a noninvasive means of detecting the presence and/or signiï¬ cance of coronary. artery disease. Coronary artery disease is a condition in which there is narrowing or blockage of the blood. vessels supplying the heart muscle. This can cause chest pain which is known as angina pectoris.
coefficient. n. 1. (Mathematics) maths. a. a numerical or constant factor in an algebraic term: the coefficient of the term 3xyz is 3. b. the product of all the factors of a term excluding one or more specified variables: the coefficient of x in 3axyz is 3ayz.
The correlation coefficient, denoted by r, is a measure of the strength of the straight-line or linear relationship between two variables. The correlation coefficient takes on values ranging between +1 and -1. The following points are the accepted guidelines for interpreting the correlation coefficient: 1  0 indicates no linear relationship. + 2 1 indicates a perfect positive linear relationship: as one variable increases in its values, the other variable also increases in its values via an exact linear rule.