I finally got my head around the idea of the null hypothesis.
The first time this idea was introduced to me was in 1978 by my geography teacher Mrs Wass (she had a lisp, which made her very memorable!! Try saying Mrs Wass our loud with a lisp! )
She was explaining the use of the null hypothesis to prove things. I didn’t understand it then, and to this day (until about 2 hours ago) I still didn’t get it.
But I just read an article (more cholesterol reading) and it mentioned null hypotheses, so I tried to figure it out.
And it made sense! We try to gather evidence for a hypothesis (of a relationship between 2 variables) by gathering evidence against the null hypothesis that there is NO relationship between 2 variables. Or something like that… not sure how long that is going to stick…
Those with a science major can correct me… I got an economics major, so I am good for nothing (except if you want to know about guns and butter)! Those that did economics will understand.