If the P value is less than 5%, reject the null hypothesis; if the P value is .05 or more, don't reject the null hypothesis. Statistics textbooks -- and statisticians for that matter -- focus almost ...

It may be common knowledge that p < .05 indicates statistical significance. Psychology students (and others) are often taught that p < .05 means the probability (p) of rejecting the null hypothesis ...

Read on to learn more about what a t-test is, the different formulas used, and when to apply each type to compare means and ...

1. You are doing some research and have collected some data from a sample of people who were randomly selected from a population in which you are interested. You have ...

You have full access to this article via your institution. We believe that an experimentally testable null hypothesis should be 'no gene effect'. An effect is proved only when this null hypothesis is ...