What is at the "heart" of hypothesis testing in statistics?

 From all sorts of different areas research is the “heart”, such as psychology, marketing and medicine, formulate hypotheses or claims about a population being studied.  Hypothesis testing is called a topic at the heart of statistics because of the technique belongs to a realm known as inferential statistics. 

the dna of humans and mice is almost 92% similar. this similarity indicates that . mice have a tail, while humans have a tailbone. the tailbone is a structure in humans.yes it's true.

sound moves fastest in solids because the molecules are tightly packed and it allows sound to vibrate