How to Find the Standard Deviation, Variance, and Mean of a Sample and a Population - Easy Tutorial

Learn how to find the standard deviation, variance, and mean of a data set that is a population or a sample. Simple step-by-step explanation by PreMath.com
"Find the standard deviation, variance, and mean when the data set [25, 26, 32, 37, 40] is a population and a sample"

[@priiyankaa356]

Marvellous and Fabulous video 👏👏👏👏
Sir I wanted the solution of this 👇👇👇👇question 👇👇👇
An aeroplane, when flying at the height of 4000m from the ground, passes vertically above another aeroplane at an instant when the angles of elevation of two places from same point on the ground are 60° and 45° , respectively. Find the Vertical distance between the aeroplanes at that instant.
😊 Hope you will provide the solution of this question soon.
Keep smiling. Stay safe and take care
Have a nice day ahead 🤗🤗🤗🤗😊😊😊😊😊

[@PreMath]

Cheers! Thank you so much Priyanka for your continued love and support. I'll upload the video on your question in next few days. Weekends are the only time I've to create video tutorials as I'm a very busy full time professional. Take care dear and stay blessed. Keep smiling as well😃

[@priiyankaa356]

@@PreMath Sure sir

[@ASK1870]

Applying trigonometry, draw two right angled triangle with the same point on the ground for angles of elevation as the acute angles 60 and 45 degrees, the same point vertically below the aeroplanes as the angle 90 degrees and with height 4000m as the common vertical side( common horizontal side but different hypotenuse). Taking tan 60 degrees, tan 45 degrees, the vertical distance between the two aeroplanes equals half of 4000m, that is 2000m

[@johnsonesan5547]

@@PreMath wow

[@amaris_1136]

Excellent instruction, thanks a lot! You make it look so simple.

[@allbout_roro8480]

This guy did what everyone couldn’t lol
Thanks for the help!!

[@armhasrob]

Thank you, Great statistics explanation in 1 video. Finally, I understand the coloration of the terms presented. Very simple when explanation and examples are presented together.

[@maithilyshri5679]

Amazing
Details are cleared here ... I don't find such videos easily considering all the points....

[@alganionprincess6195]

This is Useful, Thankyousomuch,it helps too much.

[@dejesusmaangracec.9159]

Thank you very informative 🤗

[@stoner1916]

great recap video, thank you

[@joshuaverdad3653]

Thank you for sharing this with us..💖

[@divjotkaursethi6991]

Wonderful explanation sir really very helpful 👏👏

[@Onlinelearning-ir2dc]

Fabulous video thank alot Sir

[@maryamfattahi9687]

Amazing!!! 👌👌

[@salaudeenhafsatbola6468]

Thank you very much sir.

[@nabill120]

Thank you very much Sir! This has been really helpful to me!

[@PreMath]

You are very welcome Nabi! I'm sure you are an awesome student 👍 I'm glad you liked it! Please keep sharing premath channel with your family and friends. Take care dear and all the best😃 Have a very happy and blessed New Year!

[@furquanshaikh1103]

Thank you sir 😊

[@Akosuaalbie]

Thanks 😊👍

[@midichance9671]

Thx so much 😊

[@nyashadzashechayambuka5000]

beautiful and simple explanation 👏🏾👏🏾👏🏾

[@PreMath]

Thanks Chayambuka dear for the visit!
You are awesome 👍 Take care dear and stay blessed😃 Kind regards
Love and prayers from the USA!

[@h.blogger622]

thank you

[@EjazAhmed-pf5tz]

one of the best lecture thank you prof.

[@PreMath]

Thanks Ejaz for the visit! You are awesome 👍 Take care dear and stay blessed😃 Kind regard

[@kamithpiumal4887]

thanks a lot

[@sudarshanreddy5115]

Tq sir 🎉🎉

[@gatluakchol4697]

That's great

[@mechellepedrera1935]

Super thank you I'm from philippines grade 11 student this is super helpful to me easy to learn ♥️

[@jakshitsethi6989]

🤝

[@johnsonesan5547]

@@jakshitsethi6989 💓

[@KAWASKoum]

Hi

[@banazamalsadiwala7516]

Thank you so much for this video

[@PreMath]

You are very welcome Banaz! Thank you so much for your continued love and support. Take care dear and stay blessed. Keep smiling😃

[@banazamalsadiwala7516]

@@PreMath sure 😊😊😊

[@banazamalsadiwala7516]

@@PreMath take care and stay safe 🙏🙏

[@johnsonesan5547]

good great wonderful💯👏👋♥

[@PreMath]

Thank you! Cheers!

[@kishanponna2723]

EXPLAIN IS GOOD

[@barundas1643]

Sir, how to find the mean and standard deviation of individual data set, like mean and SD. Of data set A,B,C etc

[@MatchupFashion]

you channel help me to understand maths

[@PreMath]

You are very welcome! Thank you so much for your continued love and support. Take care dear and stay blessed😃

[@segunodugbesan3075]

Great

[@luciamali3089]

Thank you

[@PreMath]

You are very welcome Lucia! I'm sure you are an awesome student 👍 I'm glad you liked it! Please keep sharing premath channel with your family and friends. Take care dear and all the best😃
Have a very happy and blessed New Year!

[@rm9994]

Thanks. Same data but different standard deviation. Why is this? Also why n-1. Why not just n? Thank you

[@mrinalkeshav7729]

What should we consider if the data set is population or sample is not clearly given in the question...?

[@jairah2418]

Wht are the difference of population and sample? How can I determine it... In wht equation I need to used

[@BeyondBeautyAisha]

Sir, in notes provided by my teacher even in case of sample two formulas are given, one with just n in the denominator and the other with n-1 in the denominator.Please make it clear that is it a mistake or there are any cases where we apply same formula for both population and sample .

[@lakshmibaipukhrambam2977]

N-1 will use when the sample size is< 30, use N when sample size is>30

[@touckyolandemadeleine4868]

❤❤❤❤❤

[@laurean.]

Thank you so much but can you please tell me where these values comes from

[@theparadigm8149]

I think they’re just random numbers

[@marianaviassy4485]

👍🙏

[@FatimaAbdullah-yu4kj]

How to identify sample and population variance

[@phoemelamackay8097]

sorry why did we need to do step 4, calculate population standard deviation?

[@carlettaskenandore5103]

watched for MTH1350

[@arcanistluckson9865]

I cant understand the Fourth column can you please explain it step by step how did you get the 49 using the method pls i cant get it

[@johnsonesan5547]

so simple

[@engineertech8708]

Are sample mean and population mean the same?

[@unknown-fs6jk]

yes there is just symbol difference

[@johnsonesan5547]

no