How to calculate Standard deviation, Variance and Mean in Casio 991 ES Plus

In statistics, the standard deviation (SD, also represented by the Greek letter sigma σ or the Latin letter s) is a measure that is used to quantify the amount of variation or dispersion of a set of data values.
Variance is the expectation of the squared deviation of a random variable from its mean, and it informally measures how far a set of (random) numbers are spread out from their mean.
This video will show you how to calculate variance, standard deviation and average in Casio 991 ES Plus calculator.

[@santigli]

Be careful: -dx is the standard deviation of the population (uses N as denominator) -sx is the standard deviation of the sample (uses N-1 as denominator) So either way you'll have to make it ^2 in order to have the variance, which will be respectively the Var of population or of the sample. Great video anyway!

[@haseebsheikh6101]

Thanks for the correction

[@10_endy6]

Thanks bro..., help me a lot

[@ishanbhanderiya7348]

thanks for mentioning that.

[@durrah4048]

Thank you so much

[@ashenone3575]

Thank you

[@salmanalphatron5813]

Thank you for taking time and uploading this video!! It was pretty useful 😋

[@Theguywithephonyname]

My goodness… i suck at knowing the capabilities of my calculator. Thanks this was very helpful, I used to manually input the values of x and x bar etc, to solve SD it was very stressful and inconvenient since we always had limited time in tests

[@sakanimotalahiajoke7136]

Thank you so much for this. It's really helpful.

[@sunilchanda1212]

bro here σx is the population standard deviation having denominator of n where as sx is the sample standard deviation having denominator of n-1 make it correct.. variance is nothing but standard deviation^2

[@minmaxmath1330]

Guys there is a mistake in this clip, sigma x @2:30, is not variance. It calculates standard deviation in case the data you used is population. which is different from Sx, sample standard deviation. Be aware

[@abhilashhm6360]

Very easy to understand. Thanks a lot for this video 👍

[@annfernandez2678]

Tnx for the vid.pretty useful as I am computing now for the test result.

[@mdasiuzzaman2127]

How do you produce a video without learning the subject??

[@yashmishra12]

that's not variance. It's Population Standard Deviation. Moreover, variance is the square of SD which is obviously not true in that case

[@animateworld-l3f]

Right ! Its not variance its SD

[@KrupalusPersonal]

Right!

[@chukwuemekachris-daviesama293]

Thank you 😭❤️ I was confused

[@IbrahimHmidan]

Great vid! Thanks!

[@MillsMassy]

💃🏼💃🏼💃🏼💃🏼 did this inclass and my lecturer didn’t know how to use a casio , said we have to figure it out ourselves 💃🏼 thank you

[@onkarphadke]

thanks a lot. Very informative

[@pathumgamage6201]

was a great help for college .❤❤

[@letsgofishingtv9800]

thank you for this video sir it helps a lot.

[@milkbeforecereal9257]

wow u have saved my life. very very greatful

[@mahach1780]

Thankyou so much for teaching this. Keep it up.

[@HowTomakeitdone]

sure, thanks for you comment

[@abdelrahmanwaleed377]

love you bro thanks you saved me

[@Tenkeskap]

Very helpful!

[@10_endy6]

Thanks bro..., really help me alot

[@HowTomakeitdone]

Glad to know that :-)

[@rahafmohammed2669]

You saved my LIFE 💖

[@Ey7]

هشش بس وش عندك هنا يالغشاشة؟

[@as6401]

Thanx brother your video is really helpful

[@HowTomakeitdone]

you are welcome.

[@mudassar1]

@@HowTomakeitdone you are not using 991ES PLUS model.

[@FilmonAron-qx4gg]

Thank you Sir!

[@SuperLolygirl]

Thankyouu this is so helpful 🙏🏻

[@tsholonosi7191]

Thanks a lot💯

[@farhansaleheen3461]

Where can I get these emulators? Someone please tell me, would be very helpful

[@asifcra7839]

Very useful tutorial

[@HowTomakeitdone]

thanks

[@mohamedyahia6662]

thank you so much

[@DeJake]

Variance is wrong! For variance you have to square the standard deviation (sx). I'm pretty sure óx is population standard deviation

[@asfashrg339]

thank you so much 👍👍👍

[@HowTomakeitdone]

Welcome

[@altomusinspr3183]

Thank you 😊

[@shoikotahsan7205]

thank u very much helping

[@HowTomakeitdone]

Welcome

[@shashankphatkure]

very good and awesome videoo

[@HowTomakeitdone]

thanks

[@rajaramyadav7546]

@@HowTomakeitdone wrong video Results are incorrect...

[@zygamex2092]

Please work on your audio. Edit: Btw, your video is helpful! Its help me a lot! Thank you!

[@farhanaahmad408]

Life saver 😊

[@shantoislam9605]

Thank you

[@adexperiment6688]

Thaanks sir

[@avabinavi1406]

Thaaaankkkk uuuuuuuu

[@fatimahaleid926]

THX bro, BUT the variance is square of SD so it must be SX Square

[@uroojzahoor6391]

Thanks

[@shashankphatkure]

thankyou soomuch 😀😀

[@princesslaraibfatima]

thanks

[@ROSHAN-bp4qb]

thank u bro

[@HowTomakeitdone]

you are welcome.

[@waheedkhan7502]

It's interesting must watch the mathematics students.................😁👍🏻😀😁😯

[@HowTomakeitdone]

Thanks

[@Eka-xk9wy]

my calculator shows only 1:type 2:data 3:Edit.. then how will I find mean option?

[@quanitahtullah2007]

Press shift then 1 and make sure you are in stats mode

[@hudaboudjema4016]

Me too

[@elias_gazi]

3. Sigma x is standard deviation

[@raihannyathifa5177]

Nice video!

[@hassansarjoon6743]

thnk u

[@HowTomakeitdone]

you are welcome... :-)

[@muhammadzeeshanjamil7972]

Nice video

[@swornaparishrestha5561]

Tq

[@kevin49473]

CANT THANK U ENOUGH RESPECT

[@sriskantharaja6]

Thanks you sir

[@niknorhafizabt.rozikmoe4470]

I love u

[@niknorhafizabt.rozikmoe4470]

Beh wei jun

[@shucaybaxmed9578]

Thanks👍👍

[@kobbygbena861]

How are you soo, good lookin'? Thanks for the help tho.😅

[@DARKBassRsR]

hey thank you so much skraaaaaaaaaaaaa

[@crislyngerolao9686]

The 3rd one is not variance i just learned that today haaayst..

[@edrienjhonpamat2707]

pataka

[@dota2tennytinyvedz302]

King, marry me

[@7SOON26]

the Variance is wrong

[@gaithaljabri5020]

sx

[@kongslark]

this is so misleading... he can't even tell what is sample or population variance..... that's definitely not a variance

[@mudassar1]

This is not 991ES PLUS model, you are using some other model.

[@rdxavan7707]

👎👎

[@adeniyifemi8759]

Please this video is very useless. So many wrong information contained in it

[@MdMusa-mz6ip]

Thanks

[@arsingh8137]

thanks

[@NITISHKUMAR-wt1fd]

thanks

[@anshulgupta4010]

thanks