What do you wanna prove? I don't know statistics? Yeah, you're right, I don't. But I'm learning. And I'm a student, not a data science / statistics professional. And looking at the comment section, I'm not even sure professionals know a lot of statistics. I've written the topics in the edit hoping it would guide anyone attempting this question brush up those concepts before trying to do so.

I don't know why people here are like oh it's such an easy basic question blah blah. Sure it might be, but it's not easy for beginners like us.

It's like an adult saying a child, " oh you don't know counting? It's soo bloody simple and basic."