First 147 words of the document:
Inferential tests are used to determine whether your results are significant or if
they are due to chance.
A statistical test looks at the size of the sample and the size of the difference
between the two groups to estimate the likelihood that the two groups are really
different or linked.
Each statistical test will work out if there is a significant difference. A
statistical difference is one which in all probability is different. In reality, there
is never a guarantee that a difference exists for certain.
For most investigations, the accepted level of significance is p<0.05 (5%) which
means 95% of the time the results will be significant and that there is a 5%
chance that the results did occur due to chance and not the manipulation of the IV.