RE: This was priced7 Oct 2020 10:27
If it weren't for that pesky "insignificant", this would be £3+.
Unfortunately, the statistical significance is what is most crucial. It's a measure of the signal-to-noise of the results.
Example:
Three tests are done, and the scores are 5, 6 and 7. This gives a total of 18 and an average of 6. The results are fairly similar, so if the test were to be repeated again, it would be reasonable to predict a score around 6.
If three tests are done, and the scores are 3, 5 and 9. This gives a total of 18, and an average of 6. But the results are not similar to each other, so if this test were repeated again, it would be difficult to predict with any accuracy what the result might be.
The p-value is a measure of the similarity of the results.