The problems of multiplicity and HARKing intertwine. Multiplicity within the study is the statistical problem that allows ...

This is the reason it is referred to as an “alternative hypothesis.” As an example: Null hypothesis: There is no relationship between mediation and the reduction of depression. Alternative ...

The null hypothesis assumes that any kind of difference between the chosen characteristics that you see in a set of data is due to chance. For example, if the expected earnings for the gambling ...

In all three methods it is assumed that the distribution of sample means for samples of size n is, at least, approximately normal with mean given by µ 0 (assume that µ 0 is 50 for the next examples) ...

How Hypothesis Testing Works In hypothesis testing, an analyst tests a statistical sample, intending to provide evidence on the plausibility of the null hypothesis. Statistical analysts measure ...

Let’s return to the example above. Our null hypothesis is: “The mean module mark for students who attend MASH workshops is the same as for students who do not attend MASH workshops.” We can see that ...

If a study is being conducted for the purpose of making an affirmative claim, then the null hypothesis must be taken as the opposite (i.e., the negation) of that claim. Example: We’ve taken the ...

5-Prime | The Null Hypothesis: More than Zero What? Perhaps primary among the challenges and conditions that face life scientists is the infinite variability between individuals. An important tool for ...

The first thing any scientist does before performing an experiment is to form a hypothesis about the experiment's outcome. This often takes the form of a null hypothesis, which is a statistical ...