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Answer the following questions for each data set:




nswer the following questions for each data set;1) Are the variables cross section or time series data?;2) How do you imagine that the data were collected?;3) Is the sample size sufficient to yield a good estimate? How do you know?;4) State you hypothesis about the sign of the slope.;5) Make a scatter plot of Y against X. Discuss what this tells you.;6) Add a Trendline to your scatter plot. Is a linear model credible?;7) Interpret the slope coefficient. Does the intercept have meaning given the range of the data?;8) Use Megastat to fit the regression model, including residuals and standardized residuals;9) Interpret the P-value for the slope coefficient;10) Interpret the R^2 value;11) Study the table of residuals. Identify outliers, and unusual observations (standardized obs. that exceed 3, and 2 std. deviations respectively).;12) Output a normal probability plot. Do you see evidence that your regression violates the assumption of normality?;13) Inspect the residual plot to check for heteroscedasticity. Report your conclusions.;14) Identify any observations with high leverage.


Paper#18223 | Written in 18-Jul-2015

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