READ Free Dumps For EMC- E20-007
| Question ID 6282 | Before you build an ARMA model, how can you tell if your time series is weakly stationary? |
| Option A |
There appears to be a constant variance around a constant mean.
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| Option B | The mean of the series is close to 0. |
| Option C | The series is normally distributed. |
| Option D | There appears to be no apparent trend component. |
| Correct Answer | A |
| Question ID 6283 | What is an example of a null hypothesis? |
| Option A | that a newly created model does not provide better predictions than the currently existing model |
| Option B | that a newly created model provides a prediction of a null sample mean |
| Option C | that a newly created model provides a prediction of a null population mean |
| Option D | that a newly created model provides a prediction that will be well fit to the null distribution |
| Correct Answer | A |