If the correlation coefficient is 0.8, the percentage of variation in the response variable explained by the variation in the explanatory variable is

Related MCQs

• In regression, the equation that describes how the response variable (y) is related to the explanatory variable (x) is:
• Suppose the correlation coefficient between height (as measured in feet) versus weight (as measured in pounds) is 0.40. What is the correlation coefficient of height measured in inches versus weight measured in ounces? [12 inches = one foot; 16 ounces = one pound]
• If there is a very strong correlation between two variables then the correlation coefficient must be
• Suppose that you have carried out a regression analysis where the total variance in the response is 133452 and the correlation coefficient was 0.85. The residual sums of squares is:
• If the coefficient of determination is equal to 1, then the correlation coefficient
• If the coefficient of determination is 0.81, the correlation coefficient
• You have carried out a regression analysis; but, after thinking about the relationship between variables, you have decided you must swap the explanatory and the response variables. After refitting the regression model to the data you expect that:
• Suppose you use regression to predict the height of a woman’s current boyfriend by using her own height as the explanatory variable. Height was measured in feet from a sample of 100 women undergraduates, and their boyfriends, at Dalhousie University. Now, suppose that the height of both the women and the men are converted to centimeters. The impact of this conversion on the slope is:
• The correlation coefficient is used to determine:
• The coefficient of correlation