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Bivariate data obtained for the paired variables x and y are shown below, in the table labeled "Sample data." These data are plotted in the scatter plot in Figure 1, which also displays the least-squares regression line for the data. The equation for this line is y = 39.73 + 0.41x. as In the "Calculations" table are calculations involving the observed y-values, the mean y of these values, and the values y predicted from the regression equation. Calculations Sample data 17.7157 oo u u fe. a ae co) (Send data to Excel ) 20.0704 0.0433 21.9773 Column sum: 66.8480 Column sum: 21.1080 Column sum: 47.7793 Figure 1 Answer the following. (a) The total variation in the sample y-values is given by the} Select ~ |, which for these data is Select ~~ i (b) The proportion of the total variation in the sample )-values that can be explained by the estimated linear relationship between x and y is ||. (Round your answer to at least 2 decimal places.) (c}) The least-squares regression line given above is said to be a line that "best fits" the sample data. The term \"best fits" is used because the line has an equation that minimizes the | Select ~ |, which for these data is) Select ~ |. | Don't Know ) ce