The following regression model has been computed based on a sample of twenty observations: = 34.2 + 19.3x. Given this model, the predicted value for y when x = 40 is 806.2.
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Q. 2In comparing two or more forecasting models, the MAD value is useful in determining how successful the models were in fitting historical data.
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Q. 3In a multiple regression analysis with three independent variables the null hypothesis for conducting the test of the overall model is: H0 : 0 = 1 = 2 = 3 = 0.
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Q. 4In using simple linear regression to find the linear trend in an annual time series from 1990 to 2005, the values 1990, 1991, etc. are used as the values of the independent variable t when the regression is conducted.
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Q. 5The variance inflation factor is an indication of how much multicollinearity there is in the regression model.
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Q. 6The sign on the intercept coefficient in a simple regression model will always be the same as the sign on the correlation coefficient.
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