The estimated regression equation for a model involving two independent variables and 10 observations follows. ý = 29.1170 + 0.5504x, + 0.4940x2 (a) Interpret b, in this estimated regression equation. O b, = 0.5504 is an estimate of the change in y corresponding to a 1 unit change in x, when x, is held constant. O b, = 29.1170 is an estimate of the change in y corresponding to a 1 unit change in x, when x, is held constant. O b, = 0.5504 is an estimate of the change in y corresponding to a 1 unit change in x, when x, is held constant. O b, = 0.4940 is an estimate of the change in y corresponding to a 1 unit change in x, when x, is held constant. = 0.4940 is an estimate of the change in y corresponding to a 1 unit change in x, when x, is held constant. O b, Interpret b, in this estimated regression equation. O b, = 0.4940 is an estimate of the change in y corresponding to a 1 unit change in x, when x, is held constant. O b, = 0.4940 is an estimate of the change in y corresponding to a 1 unit change in x, when x, is held constant. O b, = 29.1170 is an estimate of the change in y corresponding to a 1 unit change in x, when x, is held constant. O b, = 0.5504 is an estimate of the change in y corresponding to a 1 unit change in x, when x, is held constant. O b, = 0.5504 is an estimate of the change in y corresponding to a 1 unit change in x, when is held constant. (b) Predict y when x, = 160 and x,2 = 320.

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.