TEST OF STATISTICAL SIGNIFICANCE

[lizzy100]

Hello,

Please, when doing a test of statistical significance judging based on the p-value and intervals, is it possible to get difference results. For example, is it possible that judging from the p-values, the independent variables are not statistically significant but judging from the intervals they are statistically significant?

Thanks a lot.

Regards,

lizzy100

[PGStats]

Yes it is possible that p-values and confidence intervals sit on opposite sides of a of a given significance threshold (such as 0.05). But it is quite rare. In any case, there isn't that much qualitative difference between p=0.049 and p=0.051.  P-values are random quantities, after all.

[PaigeMiller]

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@lizzy100 wrote:

Hello,

Please, when doing a test of statistical significance judging based on the p-value and intervals, is it possible to get difference results. For example, is it possible that judging from the p-values, the independent variables are not statistically significant but judging from the intervals they are statistically significant?

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I'd prefer not to make any meaningful comment on your results without seeing the results. Please show us the actual SAS output so we can see what you are seeing. I don't even understand the answer from @PGStats without seeing an example.

It is my understanding that (except for round-off error), the confidence interval and the statistical test ought to produce equivalent answers.