This is word to describe a proposal or suggestion that as yet cannot be proven to be true or false
Scientists often set up a hypothesis and then carry out experiments to prove whether or not it is true.
For example, you could forward a hypothesis like this:
"I believe more than half of all supermarket shoppers are younger than 30 years old".
One way you could go about proving this is to carry out a sample questionnaire that asks customers their ages. It would be impossible to ask every single customer their ages, even if they were willing to tell you. So "statistics" is used to prove that you have enough answers (sample size) to make a reliable judgment.
Challenge see if you can find out one extra fact on this topic that we haven't already told you
Click on this link: Hypotheses