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What is hypothesis testing? What are the differing roles of the null and alternative hypotheses?

What is hypothesis testing? What are the differing roles of the null and alternative hypotheses?

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Hypothesis testing is the way to test the claims about population parameter

It is done by considering a sample and testing it to conclude about the population.

There are two hypothesis in hypothesis testing, null and alternate, they both are exactly opposite of each other

Null hypothesis usually means no difference

While alternate hypothesis is takes the claims like, greater than, less than or not equal to.

Null hypothesis is rejected when the obtained p-value is less than the given significance level

And when we reject the null hypothesis, alternate hypothesis is accepted

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