Live revision! Join us for our free exam revision livestreams Watch now


Probability and Significance

Probability and significance are very important in relation to statistical testing. Probability refers to the likelihood of an event occurring. It can be expressed as a number (0.5) or a percentage (50%). Statistical tests allow psychologists to work out the probability that their results could have occurred by chance, and in general psychologists use a probability level of 0.05. This means that there is a 5% probability that the results occurred by chance.

© 2002-2024 Tutor2u Limited. Company Reg no: 04489574. VAT reg no 816865400.