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When the sample correlation coefficient, r, is greater than 0, there is (a) linear relationship between x and y. positive normal no negativeIn this class, we consider a sample correlation coefficient greater than or equal to _ in absolute value to indicate a strong linear relationship. When the sample correlation coefficient r is negative, as the value of x increases, the value of y tends to decrease approach 0 remain the same increase Can we use the covariance matrix computed via Data Analysis Toolpak in Excel? No Yes