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How to find the variance and standard deviation from a set of data 

Brian McLogan
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12 сен 2024

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Комментарии : 325   
@eian2k601
@eian2k601 4 года назад
When you realize you can learn and learn a whole semester semester of math in a day of watching RU-vid.
@crunchysoup8515
@crunchysoup8515 4 года назад
i learn more here than the 30 minutes in class
@sizuchii
@sizuchii 4 года назад
true. i understand lessons here than my own math teacher discussing idk words in front of the class.
@ygmsniper
@ygmsniper 3 года назад
You are absolutely right.
@thelordnaevis4946
@thelordnaevis4946 3 года назад
Had summer class because of this. Was still confused in summer class. This helped. Then 2 weeks after summer class, I’m back in school. Which is bullshit.
@eenchantress5113
@eenchantress5113 3 года назад
Try an hour before an exam
@thetravelingteacher4474
@thetravelingteacher4474 4 года назад
Thanks to you I'm passing my online college statistics class!! The chart is a great idea !!!! Thank you!
@josiahcisneros2968
@josiahcisneros2968 6 лет назад
Richard getting called out like that smh
@brianmclogan
@brianmclogan 6 лет назад
ohh Richard
@CasualCrypt
@CasualCrypt 4 года назад
Richard, get back in your seat bro
@luistamayo8666
@luistamayo8666 4 года назад
Fuckin Richard bro
@101kleinke
@101kleinke 3 года назад
That nigga never listens
@texasxo2404
@texasxo2404 3 года назад
Lmao
@raymondsmith9886
@raymondsmith9886 3 года назад
As always great. He actually explains the problem that's why he's a good professor!
@jessicacelineb.oliveros1439
@jessicacelineb.oliveros1439 2 года назад
truth bro!
@danieljoshua1926
@danieljoshua1926 11 месяцев назад
When he explained it better than my math teacher
@michellezulema9422
@michellezulema9422 2 года назад
I learned all of this in just 8 minutes after it took me days to try to understand my statistics text book. Great videos !👏🏼👍🏼
@user-en5pr4iw4k
@user-en5pr4iw4k Год назад
Same here!!
@kyleschwartz.
@kyleschwartz. 5 лет назад
this dude is the GOAT
@adventurwithken412
@adventurwithken412 4 года назад
Do you have a playlist for statistics? I will like to watch all your statistics videos please. Your teaching style is amazing. Thanks in advance
@theresadaily126
@theresadaily126 Год назад
Thank you
@woolzem
@woolzem Год назад
Yes!!
@rachelturner5192
@rachelturner5192 2 года назад
Taking college stats & your teaching is sooo helpful & I can actually understand the material. You are very passionate about statistics & it shows! Thanks:)
@catirerubio
@catirerubio 6 месяцев назад
I think the teacher uses n instead of -n as the divisor because the problem is for a population, not a sample of a population. That important point should be included in the lesson. The concept is difficult enough without explaining this crucial point.
@PolskaBabii
@PolskaBabii 7 месяцев назад
I have enrolled in Sophomore level (University) statistics, just to drop it, like 4 times, because I knew, before the midterm, that I was not going to be able to pass it. I finally did, with a C. Not my best work. I am an A/B student. Years later, I am back in school for a second degree, and I am having to re-take statistics because the statistics I have credit for is "statistics/business majors" and now I am a pre-nursing student, so they are making me take regular statistics (not for business majors), which I think is ridiculous, considering its the same material, same book, same chapters are covered, but I digress. I had a melt down when I found out I would have to take this class again, especially as it is the last class I have to take to enter nursing school. If I had access to these videos way back when, I could have passed statistics the first time, with an A. I have a A in my class now, and am breezing through, with EASE. This class used to keep me up at night, stressed beyond belief. I am actually enjoying it now. It amazes me, the difference it makes, when you have a GOOD teacher. I cannot thank you enough for your time and effort put into this channel. You have saved me from a guaranteed ulcer.
@jordanblair770
@jordanblair770 6 дней назад
Man, I was so excited when I clicked on this video and saw you! I used your videos in high school and now I'm using them in college
@rajathalder3854
@rajathalder3854 4 года назад
love you sir, I am from india. your teaching style is so nice
@KingTarmiel
@KingTarmiel 3 года назад
When I spent my day reading books but learned nothing so I swallowed my pride and watched youtube
@vymae2008
@vymae2008 3 года назад
Lol same here
@randomguy8228
@randomguy8228 3 года назад
Why would you need to swallow your pride lmfao
@KingTarmiel
@KingTarmiel 3 года назад
@@randomguy8228 because I thought i don't need help. Simple as that LOL
@gabebarbieri194
@gabebarbieri194 2 года назад
For the variance, isn't the summation of (xi-xbar) squared divided by n-1 rather than n?
@hmode1533
@hmode1533 2 года назад
yes, that is why i am a bit confused.. i calculated it and devided 86.9 / 9 = 9.65 the variance, for standard deviation it is = 3.10
@jehnelagnesmandolado5348
@jehnelagnesmandolado5348 Год назад
Maybe he got confused but it is supposed to be n-1
@stevenayala-earayala3482
@stevenayala-earayala3482 3 года назад
Thank you so much. You are an excellent teacher and glad this video is still around. I hope you have a whole lesson(s) on stats.
@shadysh8s
@shadysh8s 10 месяцев назад
I am so happy that John Fetterman teaches math :) Couldn't make it through school without you,
@Mrs.Thomas48
@Mrs.Thomas48 2 года назад
When you wished that this guy could have been my math teacher when I was in school. Thanks for explaining everything so clearly. Getting ready to take my Math 4-8 certification exam -- I finally get it! Thank you!
@gritworth805
@gritworth805 6 лет назад
Omg, thank you soooooooooo much, you explain it very well!!!!
@brianmclogan
@brianmclogan 6 лет назад
happy to be able to help!
@adventurwithken412
@adventurwithken412 4 года назад
Just wanted to say THANK YOU. You are a good teacher,
@user-sk3nf2vv4p
@user-sk3nf2vv4p 2 года назад
now that you said it i got confused
@kurt9722
@kurt9722 4 года назад
2:07 nice
@ardagurbuz6924
@ardagurbuz6924 4 года назад
Nice
@inexperiencedtrader6941
@inexperiencedtrader6941 4 года назад
Nice
@ellatinonation
@ellatinonation 4 года назад
Nice
@gosu5850
@gosu5850 4 года назад
haha
@ZeroTNitrous
@ZeroTNitrous 2 года назад
this guy just gives off the perfect math teacher vibes, I can't explain it. thank you so much!! videos are always so helpful
@nadinealahmad2942
@nadinealahmad2942 10 месяцев назад
Some teachers have skill issues
@TheEPICOSITY143
@TheEPICOSITY143 5 лет назад
Richard gettin called out LOOL
@kei7803
@kei7803 3 года назад
I got confused about the square root of 8.69=9.32, I thought my answer is wrong, thanks to the guy who noticed the answer. Anyways thank you, Mr. Brian, your videos are a big help to me.
@CAROLYNN14100
@CAROLYNN14100 2 года назад
you are the best teachers on RU-vid that I have ever came across who solves problems step ny step
@dakotarhoades6924
@dakotarhoades6924 3 месяца назад
thank you so much for this video, I had missed this class and didn't know how to do it. with your explanation and visuals I learned it so fast as was able to finish my work all today. you are a god send
@abrahamhoskinsx4698
@abrahamhoskinsx4698 6 лет назад
Thanks you are very good at explaining your steps and using new methods! Your awesome!
@brianmclogan
@brianmclogan 6 лет назад
you are very welcome! happy to be able to help
@maden8154
@maden8154 9 месяцев назад
I am confused I thought it was n-1 at bottom instead just 'n" for the variance. Like devide by n-1
@nikkiej.5875
@nikkiej.5875 3 месяца назад
I couldn’t remember how to find the variance so I had to watch a video to refresh my memory. This video was very concise. Thank you.
@andrewlira1537
@andrewlira1537 Год назад
I was about to question why he got the incorrect SD, yet I was glad it was raised by the student lol
@zalrawi80
@zalrawi80 4 года назад
Thank you so much for this valuable help. This video saved me in my master's program.
@destinylierman5395
@destinylierman5395 4 года назад
Thank you so much for this video! If it wasn't for this video I would have struggled hard with my statistics test.
@natashaplatt4623
@natashaplatt4623 4 года назад
You are so brilliant! I have learned more from your videos than my actual classes and text books. Thank you so much!
@jazzscott9850
@jazzscott9850 3 года назад
I know this video is old but it just saved me I am horrible at math never really understood much in it but the way you did this step by step is easy terms was so helpful and helped me understand what I was actually doing and had to do so thank you!
@yanglu8838
@yanglu8838 2 года назад
Wow, thank you so much for clarification of variances for me. I am currently finishing my masters degree and haven't take a statistics class. So this does explain the concept well. Thanks again!
@TheFoolishJourney
@TheFoolishJourney 4 года назад
You'ee a savior ◉‿◉ I learned more in 8 mintues than 1 sem hahahahahahahahahah
@yazenzei8894
@yazenzei8894 3 года назад
the way he wrote 66 was amazing 2:09
@Mia-cf9kj
@Mia-cf9kj 3 года назад
Math is easier if it is taught by a good teacher
@jennybee6610
@jennybee6610 4 года назад
This is perfect! Just what I needed !! Thank you .
@robjones2265
@robjones2265 Год назад
well this is the second time this channel has helped me with my college math work.
@brandisilva8911
@brandisilva8911 Год назад
YOU are amazing!!! Do you have more videos?? You just taught me in 8 minutes what Ive been struggling to understand in one whole week.. Stats is my very last class standing between me and my BA and Ive been putting it off for a whole year bc every time I sit to do my homework, I cry.
@brianmclogan
@brianmclogan Год назад
I have over 12,000
@curateitgorl
@curateitgorl 2 года назад
Very thorough! Wished you were my previous stats prof. Explained well.
@seriii2805
@seriii2805 2 года назад
Thank youu! i finally undestand how to get the variance have a good day!
@felixhope-vu3jy
@felixhope-vu3jy Год назад
U'r the best it's simple, understandable and helpful .🙏
@falseking7197
@falseking7197 Год назад
Been a fan of your channel for a long time now and you have helped me once again, thank you so much.
@johnyepowamulolo5489
@johnyepowamulolo5489 4 года назад
It should divided by n-1
@stephaniesepko6843
@stephaniesepko6843 4 года назад
yeah youre right. I went to go put the answer in mhy Homework and it told me n-1 and also 8.69 divided by 10 is 0.869
@raspberryzpower
@raspberryzpower 4 года назад
@@stephaniesepko6843 it's 86.9/10, not 8.69. 8.69 is the variance.
@mariamasannymohammed16
@mariamasannymohammed16 4 года назад
Yh u are correct
@user-wj8dh3cg4w
@user-wj8dh3cg4w 4 года назад
That’s only for a sample variance, he’s doing a population variance, he’s very correct
@mursaleenakhtar970
@mursaleenakhtar970 4 года назад
He is right because he is dealing with total population which is n=10 and we use n-1 where we are drawing sample from the population. For more brief lets take as example If we want to measure height of one class of 15 students and we are taking all the students so it means we are taking whole population (Class of 15 students). Here we use 'n' not 'n-1'. If we want to measure height of one all students in a university which are 1500 students and we are taking only 15 students so it means we are taking sample from whole population. Here we use 'n-1' not 'n'. Hope explanation will assist you.
@josielaure8987
@josielaure8987 4 года назад
This was useful but the for the standard deviations it n-1 and not just n
@R_shah
@R_shah 3 года назад
Thats for sample variation s²
@janethtorres07
@janethtorres07 3 года назад
omgg i was so confused at the end and kept going back just to find out 30 min later it was wrong😭
@jaidendavila7701
@jaidendavila7701 3 года назад
Litterally 🤣 i was sitting there like.... 🤨 wayment
@renzandrewdelacruz7666
@renzandrewdelacruz7666 3 года назад
Hahahha ify
@roycejazontesorero9097
@roycejazontesorero9097 3 года назад
IKRRRRRRRRRRRRR
@ygmsniper
@ygmsniper 3 года назад
I was about to go back at the previous minutes of the video, but decided to just finish the whole lesson. Thank goodness it was corrected just a few seconds later.
@AmandaGabriel876
@AmandaGabriel876 3 года назад
Good teacher👏🏽
@jovanmaefajardo
@jovanmaefajardo Год назад
Maraming salamat po! ❤️ Today is our exam and it was so difficult for me because I'm not really into Math 😭 then finally i understand this way of solving than the examples in textbook. THANKYOU Prof!❤️
@phantomfreeman283
@phantomfreeman283 4 года назад
Helpful 5 minutes before my algebra final.
@WhereisNaz
@WhereisNaz Год назад
WE LOVE MR MCLOGAN💯💯💯
@maroondragon5316
@maroondragon5316 3 года назад
Thank you, I am in an online practical math class and this video is helping me!!
@nicolehamilton8705
@nicolehamilton8705 4 года назад
Thank you..this helped alot!
@user-nb3wh7ij9s
@user-nb3wh7ij9s 2 месяца назад
very well explained thank you very much.
@eledinaguarde3999
@eledinaguarde3999 2 года назад
Thanks for sharing..it really helps..now that I am answering my assessment in statistics.
@riovillanueva6787
@riovillanueva6787 3 года назад
Hi Brian. Just tried this method solving variance for nos: 8,8,9,12 ...and I got 2.68 for variance. Did I got the correct answer? Just checking if I did the right solution 😊😊😊
@cheerup4566
@cheerup4566 Год назад
It is 👍
@takeoff4409
@takeoff4409 4 года назад
Thx
@jessicacelineb.oliveros1439
@jessicacelineb.oliveros1439 2 года назад
love u bro i believe that with the power of Mr bryan mclogan I can pass my statistics quiz today Amen thank you bro
@jessicacelineb.oliveros1439
@jessicacelineb.oliveros1439 2 года назад
i second that! we love you 🧔‍♀- ap stats eia
@attach8860
@attach8860 3 года назад
thank you! taught me more than a powerpoint that my professor gave me!
@lerrysteven9231
@lerrysteven9231 3 года назад
Thanks
@that_girlbob
@that_girlbob 4 года назад
Can you explain why the MEAN is 66.1 and not 66? Where did the .1 come from? Thank you
@connorclark3325
@connorclark3325 Год назад
I'm sure you know now as this is 3 years old but the mean is average and I'm pretty sure you were thinking of median
@ravendell3015
@ravendell3015 4 года назад
Thank you, very helpful
@duffinthemuffin5792
@duffinthemuffin5792 3 года назад
I know I'm very late to the party just reviewing standard deviation what exactly did you do at 6:46 I didnt quite catch that
@sblackartemis5376
@sblackartemis5376 3 года назад
Yeah me too
@Anadeldr1luv
@Anadeldr1luv 4 года назад
I’m dead inside from my statistics class
@aamirabdulsalam
@aamirabdulsalam 2 года назад
MR BRIAN I LIKE YOU FROM PAKISTAN, YOU ARE ALWAYS HELPFUL TO ME
@solomonduku2391
@solomonduku2391 3 года назад
Thank you for making me understand gracious
@charlottbadza1953
@charlottbadza1953 4 года назад
You have made my life easy, thank you
@maneetwalia2721
@maneetwalia2721 4 года назад
I paused ur video and getting root wrong.. then i started ur video i got the same answer in the laste bcz u took wrong root by mistake.... Sir vry nice teaching method....👍👍👍
@liquiiiddd
@liquiiiddd 3 года назад
This upload helped me a lot, thanks Brian!
@daniyatennant1574
@daniyatennant1574 Год назад
When do you use n-1 for variance to divide? Bc I divided by n for my work, but my teacher told me dividing by n-1 is the correct way to solve
@mssaxon85
@mssaxon85 11 месяцев назад
This is what I am confused about now did you ever figure out the proper way
@sellahyekha4349
@sellahyekha4349 10 месяцев назад
For sample values you use n-1 and n for population values
@bryanwilson4695
@bryanwilson4695 9 месяцев назад
w reply@@sellahyekha4349
@DarkPrincess_M
@DarkPrincess_M 2 месяца назад
How am I supposed to know if it's a population or sample?
@marcogush4376
@marcogush4376 3 года назад
You are better than my prof.
@yvettehernandez9038
@yvettehernandez9038 Год назад
Thank you sir!
@mr.burgess2575
@mr.burgess2575 2 года назад
This guy is a legend!
@jobekirkuk
@jobekirkuk 2 года назад
I became one of your fans man!
@eugenaharley7103
@eugenaharley7103 4 года назад
Thank you!!!
@cjwilliams5195
@cjwilliams5195 Год назад
freaking Nathan man, guy cracks me up
@Renostat_
@Renostat_ 3 месяца назад
i’m so bad at math that i cry over it and i’m going to have to use this whole table method to actually be able to do this thanks for making it easier
@alejandroresendez3498
@alejandroresendez3498 3 года назад
thank you for teaching me
@theresejarquio7039
@theresejarquio7039 4 года назад
a great help, thanks!
@desmondmccobby4457
@desmondmccobby4457 3 года назад
i love your teaching sir
@brianmclogan
@brianmclogan 3 года назад
Thank you!
@anabelambriz3251
@anabelambriz3251 5 лет назад
thank you!
@Obs1d14n.Bl4de
@Obs1d14n.Bl4de 2 года назад
Can't believe an hour and a half of STATS class and I was still so loss, just for an 8 minute video to make me understand lmao.
@TheJessaMattson
@TheJessaMattson 2 года назад
Thank you so much for uploading this!
@alabriking
@alabriking 4 года назад
thanks man really thanks
@rojohn3159
@rojohn3159 4 года назад
sir how to take the square root off the value?
@taybro893
@taybro893 2 года назад
Thank you
@user-sk3nf2vv4p
@user-sk3nf2vv4p 2 года назад
Thanks you so much
@shanemay6090
@shanemay6090 2 года назад
So, sir the mean doesn't need to be always whole number. The mean is accepted with a decimal point, right?
@necholsmangubat2108
@necholsmangubat2108 3 года назад
Thank you so much for this!
@teedee1167
@teedee1167 5 лет назад
good example. thanks
@shakirhassan6027
@shakirhassan6027 4 года назад
awwsome teaching method.....thankuuu sir
@fakeemcee9985
@fakeemcee9985 3 года назад
i hope all the teachers is like him on how he discuss and explain its just like smooth as butt of the baby
@jdoesmath2065
@jdoesmath2065 Год назад
Good explanation ... but lots of notation errors. If you're calculating sigma, x-bar should be myoo and n should be N. If you are calculating s, then you should divide by n-1, not n. Some teachers are super picky about notation ... I'd hate for students to lose points for poor notation.
@Sirjacome48
@Sirjacome48 4 года назад
thank you so much for the help!
@ganeshcshet2537
@ganeshcshet2537 Год назад
Thank you sir
@strikingblazer760
@strikingblazer760 2 года назад
Saved my grade
@junhokim5824
@junhokim5824 Год назад
Thank you so much !
@brianmclogan
@brianmclogan Год назад
You're welcome!
@carolo6098
@carolo6098 2 года назад
you are the GOAT
@riovillanueva6787
@riovillanueva6787 3 года назад
And for the Std Dev for nos: 11, 12, 15, 8 I'm getting 2.5 Is this correct on your end? 😊😊😊
@feelthunder123
@feelthunder123 3 года назад
Thankyou soooo moch
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Просмотров 1,3 млн