What would happen to the pvalue in an ANOVA if the data set

What would happen to the p-value in an ANOVA if the data set was doubled by duplicating the data?(That is, you create a new dataset made of two copies of your data, thus doubling the number of observations, but keeping the same number of treatments or groups.)Justify your answer

Solution

Here, the P value will decrease, as you just showed that the data did not just happen by chance (you got it once again).

Thus, this will be more rare a result, and the P value will decrease. [ANSWER]