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Explain why we test the null hypothesis.

Explain why we test the null hypothesis.

Math   Statistics-And-Probability   
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We test the null hypothesis because the test of significance is designed to assess the strength of the evidence against the null hypothesis. ... The statement that is being tested against the null hypothesis is the alternative hypothesis.

So, when we fail to find significantly low probability of null hypothesis to happen, then we say our test "fails to reject the null hypothesis basis our evidence".

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