SEU PHC 321 Applied Biosatatistics Questions

I’m working on a public health discussion question and need an explanation and answer to help me learn.

Statistical hypothesis testing is a procedure that allows researchers to evaluate hypotheses about population parameters based on sample statistics.”

Discuss the following points in light of the above-mentioned statement:

What exactly is the purpose of hypothesis testing in      statistical analysis? What does hypothesis testing obtain that could not      be obtained otherwise?

Explain the distinction between a Type-I error and a Type-II      error. Is it easier to commit one type of error than it is to commit      another? Is one type of error more detrimental than another?