Question

What is hypothesis testing?

Answer 1

the theory methods  and practice of testing a hypothesis by comparing it with the null hypothesis. The hypothesis is only rejected if its probability falls below a  level, in which case the hypothesis being tested is said to have that level of significance. that is your answer i think 

Answer 2

Answer:

Comparing a statistical method to prove a hypothesis is primarily significant or not by comparing it with a null hypothesis. It is the method used to find the probability of the hypothesis to be proved in the future on the basis of the small population sample.

The null hypothesis is a hypothesis where no important difference between the random variables. It is just hypothesized for hypothesis testing and comparing with alternate hypothesis.