15.Express the confidence interval 69%±8.8% in the form of a trilinear inequality. __________%

15.Express the confidence interval 69%±8.8% in the form of a trilinear inequality.


__________%

32. Using your favorite statistics software package, you generate a scatter plot with a regression equation and correlation coefficient. The regression equation is reported as y=95.55x+51.53and the r=0.513.


What proportion of the variation iny can be explained by the variation in the values ofx?

r² =______ %