The regression model 200 5x1 2x2 has been fitted to a set of data If x2 10, what will be the effect on if x1 increases by 1 unit Will your answer change if x2 20 Given the preceding, comment on whether interaction appears to exist between x1 and x2 ...

If x 2 10 a 1unit increase in x 1 will increase by 5 ...

The regression model = 200 + 5x1 2x2 has been fitted to a set of

Question:

The regression model ŷ = 200 + 5x1 – 2x2 has been fitted to a set of data. If x2 = 10, what will be the effect on ŷ if x1 increases by 1 unit? Will your answer change if x2 = 20? Given the preceding, comment on whether interaction appears to exist between x1 and x2.