what is the null hypothesis and can you give me some simple examples?
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More or less, the null hypothesis is a hypothesis that states there wasn’t anything important discovered in observation. If it’s a two-group trial and control study, the null hypothesis is generally “the trial group is no different”.
If the study is testing a medication, the null hypothesis is “it doesn’t do anything”.
If the study is comparing gender differences in some mental task, the null hypothesis is “there isn’t a difference”.
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