Need help with these 3! A regression line was calculated as y\' = 9.7-3.2x. The

Question

Need help with these 3! A regression line was calculated as y' = 9.7-3.2x. The slope of this line is 9.7. True False Before it makes sense to plot the Regression line and try to extrapolate predictions, the __________should be tested for significance utilizing a Hypothesis Test. non-linear curve population average scatter plot correlation coefficient If the correlation coefficient is 0.790, what is the explained variation? 79% 21% 27% 62.4% Correlation is determining whether a relationship exists between and (input) ___________

Explanation / Answer

17) false ; slope of the line is -3.2

18)correlation coefficient ; option D

19) explained variation =r2 =(0.79)2 =0.624~62.4% option D

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