### Chapter 4 Exercise

Anicia Hibdon

Descriptive Methods in Regression and Correlation

 1 A value of r close to +1 or -1 indicates that there is a ______ linear relationship between the variables. _____ r 2 The symbol that is used for the linear correlation coefficient is ______. _____ strong 3 Regarding what is used to decide on the line that best fits a set of data points, what is that item called? _____ positively 4 A value of r close to ______ indicates that there is either no linear relationship between the variables or a weak one. _____ not very useful 5 A value of r close to _____ indicates that the regression equation is extremely useful for making predictions. _____ negatively 6 A value of r close to 0 indicates that the regression equation is either useless or _____ for making predictions. _____ zero 7 In the context of regression, an _____ is a data point that lies far from the regression line, relative to the other data points. _____ least squares criterion 8 If y tends to decrease linearly as x increases, the variables are _____ linearly correlated. _____ outlier 9 If there is no linear relationship between x and y, the variables are linearly ______. _____ + or - 1 10 If y tends to increase linearly as x increases, the variables are _____ linearly correlated. _____ uncorrelated

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