The estimated regression equation for a model involving two independent variables and 10 observations follows. ŷ = 22.12

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The estimated regression equation for a model involving two
independent variables and 10 observations follows.
ŷ = 22.1270 + 0.5908x1 + 0.4990x2
(a)
Interpret
b1
in this estimated regression equation.
b1 = 0.5908 is an estimate of the
change in y corresponding to a 1 unit change
in x1 when x2 is
held constant.b1 = 0.4990 is an estimate
of the change in y corresponding to a 1 unit
change
in x2 when x1 is
held constant. b1 =
0.4990 is an estimate of the change
in y corresponding to a 1 unit change
in x1 when x2 is
held constant.b1 = 22.1270 is an estimate
of the change in y corresponding to a 1 unit
change
in x1 when x2 is
held constant.b1 = 0.5908 is an estimate
of the change in y corresponding to a 1 unit
change
in x2 when x1 is
held constant.
Interpret
b2
in this estimated regression equation.
b2 = 22.1270 is an estimate of the
change in y corresponding to a 1 unit change
in x1 when x2 is
held constant.b2 = 0.4990 is an estimate
of the change in y corresponding to a 1 unit
change
in x1 when x2 is
held constant. b2 =
0.5908 is an estimate of the change
in y corresponding to a 1 unit change
in x2 when x1 is
held constant.b2 = 0.4990 is an estimate
of the change in y corresponding to a 1 unit
change
in x2 when x1 is
held constant.b2 = 0.5908 is an estimate
of the change in y corresponding to a 1 unit
change
in x1 when x2 is
held constant.
(b)
Predict y when
x1 = 170 and x2 = 320.