## What is the Null Hypothesis?

The null hypothesis is a statement that there is no relationship between two measured phenomena. It is a hypothesis that has not been tested or proven, and is usually used as the starting point for an experiment.

The null hypothesis is used in statistical testing to determine if the results of a study are due to chance or if there is a real effect. To test the null hypothesis, researchers will compare the results of an experiment to a predetermined value. If the results are not significantly different from the predetermined value, then the null hypothesis is accepted.

In some cases, the null hypothesis is rejected if the results of the experiment are significantly different from the predetermined value. This means that the experiment has revealed a real effect.

The null hypothesis is often used in scientific research to determine whether a result is due to chance or if it is a real effect. For example, if a researcher is studying the effects of a certain drug on a group of people, the researcher may set up a null hypothesis that states that the drug has no effect on the group. If the results of the experiment show that the drug does have an effect, then the null hypothesis is rejected and the researcher can conclude that the drug had an effect on the group.

The null hypothesis is an important tool in scientific research, as it helps researchers determine if the results of an experiment are due to chance or if they are due to a real effect. By setting up a null hypothesis, researchers can determine if their results are due to chance or if they are due to a real effect.