Table 1.
Final univariate models for homicide, alcohol-related, and suicide death rates
| Series | Model | Q statistic |
|---|---|---|
| Homicide | (0,1,1)a | Q = 9.1; df = 11; p <.63 |
| Alcohol | (0,1,1) | Q = 15.9; df = 11; p <.16 |
| Suicide | (0,1,1) | Q = 7.2; df = 11; p <.79 |
a
The general form of the non-seasonal ARIMA model is: (p,d,q): where p = the order of the autoregressive parameter, d = the order of differencing, and q = the order of the moving average parameter. Q = Box-Jenkin's test statistic for the null hypothesis that the model residuals are distributed as white noise.