Standard Deviation (1 of 2: Introduction to Standard Deviation and what it measures)

[seanmaclean]

It amazes me that I'm enrolled in a university statistics class, watched a 1.5hr lecture and worked my way through a textbook chapter but was still a little vague on what the Standard Deviation actually was; yet a high school teacher can explain it more effectively. Why am I even paying for a university education?

[misakiotaku_]

I love how enthusiastic he is. It makes the whole class much more engaging ☺️

[sureshothwarang]

This high school teacher is so damn better than my PhD professor wtf

[PS-onjm]

because in university they don't care about teaching. They are just presenting the information. It is rare to find a real teacher

[swldnsstory]

in my School we call this topic: Measures of Location and Dispersion :)

[sankyeat]

Are you ever going to cover the normal distribution? I notice it was greyed out on your website so I'm hoping that means you'll cover it soon?

[belladurham]

Me watching this 2 days before HSC Maths lol

[mjmj]

Questions: why do we square?
If the answer if to remove the ‘negative’ differences and make them positive, because if we simply find the average of all deviations with keeping negatives negatives and positives positives we will always get 0, then why don’t we take the absolute value?

[shadowkokufu]

RMS..?? Like in physics with generators?? The root mean square?? What..??

[alexiscox]

Firstly, they can’t arrest her based off of just your word even if your co workers co-sign for you. Secondly, don’t ever state “I know your chief” or “I’m cool with the manager” or any anything that would suggest that you have some sort of leverage or sway with anyone. You definitely do not follow that statement with “ or there’s going to be a problem”, you were the hit and you want Justice I get that. However, we really don’t know if he said anything to her to entice this reaction, it was the wrong reaction but sometimes people can take you there. The video evidence was enough for the officers to see the truth. Let the evidence speak for itself. And lastly, this disorderly conduct nonsense for assault is surprisingly common. How the hell is her practically chasing him and having to be held back and ultimately scratching him in the face just disorderly? Foolishness. Moral of the story if someone calls you a name you need to walk away, not chase them when they walk away and have to be held back by others.

[elmarahman]

Why does it goes (n-1) in denominator in my finance book?

[santinot]

Who’s the girl in row 3? I’d multiplicate with her