Multiple choice For these data, what is the three-period centered moving average

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Multiple choice

For these data, what is the three-period centered moving average for period 4? A. 33.33 B. 31.33 C. 33.00 D. 34.00 The residual plot below suggests which violation(s) of regression assumptions? A. Autocorrelation B. Heteroscedasticity C. Non-normality D. Multicollinearity Refer to the following regression results. The dependent variable is Abort (the number of abortions per 1000 women of childbearing age). The regression was estimated using data for the 50 U.S. states with these predictors: Ed Spend = public K-12 school expenditure per capita, Age = median age of population, Unmar = percent of total births by unmarried women, lnfmor = infant mortality rate in deaths per 1000 live births.

Explanation / Answer

17.

Look at the residual plot.

The plot suggests that for less Docs the resifuals are relatively low

For higher Docs the points are spread out and hence more residual.

This is a typical "Heteroscedasticity" plot

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