A correlation coefficient of -0.8 or lower indicates a strong negative relationship, while a coefficient of -0.3 or lower indicates a very weak one. • A negative correlation indicates two variables that tend to move in opposite directions. Study with Quizlet and memorize flashcards containing terms like If there is a negative correlation between X and Y then the regression equation, Y bX + a, must have: a) b < 0 b) b > 0 c) a < 0 d) a > 0, A paired data set has a mean X 10 and a mean Y 8, and slope of the regression line 1.5.
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