When the p-value is 0.001 or less,there is extremely strong evidence that the null hypothesis is true.

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When the p-value is 0.001 or less, there is extremely strong evidence that the null hypothesis is false, not true. A p-value of 0.001 means that there is only a 0.1% chance that the observed effect is due to chance alone, so the null hypothesis is rejected in favor of the alternative hypothesis.

When the P-Value Is 0