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QUESTION

The following graphs are used to verify some of the assumptions of the ordinary least square regression of Y and X1,X2.

The following graphs are used to verify some of the assumptions of the ordinary least square regression of Y and X1,X2.........,Xp.

1) The scatter plot of Y versus each predictor Xj

2)The scatter plot matrix of the variable X1,X2......Xp

3)the normal probability plot of the internally standardized residuals.

4)the residual versus fitted values

5)the potential-residual plot

6)Index plot of cook's distance

7)Index plot of Hadi's influence measure

for each of these graphs

a) What Assumption can be verified by the graph

b)Draw an example of the graph where the assumption does not seem to be voilated

c)Draw an example of the graph which indicate the violation of the assumption

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