Casio fx-97SG X mean and standard deviation 

Life saver...

Bro just taught Standard deviation in 1 min, Bloody god sent man

Thank uuuu, tomorrow is my emaths exams, this really helped!

Absolute legend thanks for saving my e math

thank you so much i forgot how to do it right before my exam and found your video. Your a life saver

OMG THANK YOU SO MUCH i forgot everything after holidays :')

bro u saved my life dei.....i cldnt be more than thankful for this

I couldn't remember which is which for the last part, so many things thank God you pointed them out 💀

BRO THANKS ITS 5 HOURS BEFORE O LEVEL AND I JUST GOT IT LOLOLOL LIFE SAVERRR

Saved my life, thank you.

thank you cher

Thank you sooo much 😭

I love this video! Ms Ng is the best math teacher! How mean is mean!

Bloody Hell mate. Thank you. I completely forgot about this crap

Goat of mathematics

THANK YOU SO MUCH ILY CHARLIE BROWNS 😮

Tysm u saved my life!

Is this for Population or Sample? I require Sample calculation, but I only get Population's standard deviation etc

wsg ethan wan

Very greate

wait but isnt it better to just type it manually in the calculator?

tysm bro

I love you thanks

olevel tmr bro

THANK YOU!!!

thanks:)

I’m scared of nightmare

Nicee

Pog

Anyone here from mr sun class?

is anyone watching this couz your nlvl is tmr

ookkkkkkkkkkkkkkkkkkkk