Hey everyone, I'm here to help. If you have any questions or just want to learn more, click on the link in the description above. It'll take you to a page where you can ask me questions.
@jhoysienho68508 жыл бұрын
Thank you for showing us how to do the weighted mean. U did better than my teacher. Thanks again
@tianova48345 жыл бұрын
Yup thank man, I’m still sad tho cause I’m gonna fail my midterm
@karnakmonroe57403 жыл бұрын
@@tianova4834 I never finished high school ( got a GED) and had to teach myself algebra, geometry, trig, and finally calculus. Im an accountant now. I hope you did well.
@kaykhinemya80863 жыл бұрын
Absolutely, he did better than my teacher :)
@htethtet34402 жыл бұрын
I'm so so happy and grateful for having a person who can explain Chem this easily. The school need more professors like him. Thank you so much.
@smritimisra7 жыл бұрын
How incredibly creative and helpful! How patiently and beautifully was this explained! 🙏🏼
@leeladsouza18568 жыл бұрын
hey if the kids weigh 100 pounds each, then together the weight is 500 and then for the average, you got to add to 300 and divide by 6 - hey is that not normal average. why do you call it weighted average?
@billiebillie6788 жыл бұрын
+Tyler DeWitt could you please answer this question? Or anyone?
@leeladsouza18567 жыл бұрын
cool!
@GRIMRAJ7 жыл бұрын
these are basic so i think he should rectify it too
@marurodriaz84126 жыл бұрын
Absolutely agree!! Why does he start calculating the mean for the kids?
@genfaamanfunzii26233 жыл бұрын
The identical weight of the five kids helps to explain weighted average more easily.
11 жыл бұрын
I thought this was average of different groups. The average person in your first example weighs 133 pound, the average group of people weighs 200. The average car weighs 3432 pounds, whilst the average car MODEL weighs 4000 pounds. I don't get the regular average at all, there is one average, and if it's 3432 or 4000 depends on the question. Maybe Swedish uses a different definition of average, but to me, weighted average is the only average.
@zenitsuagatsuma88984 жыл бұрын
Same here, weighted average is the only average that i know.
@FM-dy9li3 жыл бұрын
Déclaration très incorrect tu sais, c’est faux. You’re obviously spitting nonsense my friend average weight for a man is 75kg 165 lbs, for a woman 45kg 100 lbs. You can’t call yourself a man if you are 133 lbs, a sub man perhaps.
@vinayabhat60062 жыл бұрын
it is , in the "regular averag" the abundance is 50%.. thats why we multiply the sum of the observations by 1/2
@vinayabhat60062 жыл бұрын
ik they use similar terminology in India and therefore these AP textbooks really confuse me
@chunshine2 жыл бұрын
I was honestly so confused when he did (100+300)/2 as the average weight. I've never seen that done.
@yobabyyo5 жыл бұрын
Um, yeah...I've also never heard of his version of the "regular average". All he's doing with his "weighted average" is to calculate the mean. "Weighted average" means that instead of assigning the same weight to each element (by simply dividing the sum by the number of elements), you assign different weights (importances) to different elements. It ends up giving a "preference" to certain elements in the sum. For example, you might have 10 measurements of your height, but five were done using a meter stick with only tickmarks every decimeter, and five were done properly using an accurate tape measure. You might not want to throw out the five less reliable measurements, but somehow you have to give them less "weight" - so you calculate a weighted average, giving e.g. the "bad" measurements only half the weight of the good ones. What you would actually end up doing here is to count each good measurement twice, and each bad one once when calculating the sum. Then divide the sum by the number of total counts, i.e.15 in this example. It biases the mean towards the good measurements in the end....look it up on wikipedia : )
@spankmobley4 жыл бұрын
What you're calling "regular average" is the average of the averages between the two groups (kids/adult). 5 kids at 100 lbs each (500 lbs) + 1 adult at 300 lbs (300 lbs) divided by the count of individual entities (6) = 133.33.
@fullmastrinio Жыл бұрын
Yeah, this is a missleading video unfortunately. Perhaps he just made a mistake but he could have double checked his calculation before posting something wrong
@sourabhchawariya66022 ай бұрын
Exactly
@anmolpardeshi31382 ай бұрын
Isnt his “weighted average” just the simple average? And then to get the weighted average, shouldnt it be ( (5/6*100)+(1/6*100) )/2?
@jasstan1802 жыл бұрын
Hi thanks for this. In 9:14, the answer you came up with was 3432 but when I did my calculations (did it thrice just to make sure), the weighted average I came up with was 3430 pounds.
@nedalmoheef2243 Жыл бұрын
me too bro lol :)
@VCodeIt9 ай бұрын
mee also
@erinaqueen83137 жыл бұрын
thank you so so so much! I'm taking Chemistry online on FLVS (Florida Virtual school) and the explanation was really confusing. I came to you tube as last resort and you explained it perfectly ! thank you thank you thank you!
@MultiDrGh9 жыл бұрын
lemona cars are awesome!
@jadeyun81494 жыл бұрын
Average of the group at 1:35 should be ((100 * 5) + 300)/6 which is 133. Average is sum of weight divided by sample size.
@XMChess-bn2jl29 күн бұрын
Excellent video. Precise and clear explanation. I especially like how you show converting % into decimals and how you split the fraction with common denominator. I needed to understand this weighted average for my work to get average cost of multiple products with different prices per each product and make the comparison with previous year's figures. Thank you 👍
@y0da._.2 жыл бұрын
This guy loki saved me life!?!?! thx dude soooo much ur a lifesaver I literally have a test coming up and I didn't understand this lesson but thanks to you know I do?!?!?!🤩🤩🤩☺☺☺
@areebaejaz94983 жыл бұрын
This is the best lesson on weighted average. I was studying borrowing costs in accounting and this made it so much easier. Thank you for this amazing explanation.
@penguinmonk76612 жыл бұрын
I had a complete blackout when I encountered weighted average for a problem for a project on heat dissipation simulation, thank you for this brief and perfect explanation, I am up to speed again.
@seanchow19999 жыл бұрын
Well explained by using the lemonas analogy!! Mann.. He is such a genius! Clap clap clap :D
@ashenafinuguse66718 жыл бұрын
I was in debate with many people about weighted average !! this is exactly what I was thinking thanks a lot
@BreathingInPixels6 жыл бұрын
This is "The best elaboration". Thanks a lot brother.
@marcoglara20124 жыл бұрын
Seems like you’re referring to the Standard average calculation as the weighted average.
@zyambo5 жыл бұрын
Excellent explanation! Odd that some people have disliked this brilliant video.
@ABC26916 жыл бұрын
An amazing video. I struggled so much understanding weighted average before watching this. Thank you so much Sir :) Respect from India
@amrmagdy50415 жыл бұрын
Great job on the material and how you explain stuff, keep up the good work Mr.Dewitt :)
@sheikhberyal32905 жыл бұрын
You posted it on in 2012, And I'm thankful to you now in 2018 :)
@ancavaida74813 жыл бұрын
wish I had access to this when I was going to school (2 decades ago), life would've been a lot easier :D
@some_random18359 жыл бұрын
Big Thanks! My Algebra exam is tomorrow and this type of question will be on it. This helped a lot.
@rituponphukon8603 жыл бұрын
You are my hero sir. ❤️❤️❤️❤️ From ASSAM .
@changgiljang46602 жыл бұрын
I have to say "WOW", finally understand why to multiply by the percentage.
@hdela81724 жыл бұрын
Well said! I completely understand nowTyler😁👍🏾 You are amazing man! You have a gift and you are very passionate in what you do💯
@maureenobando4956 Жыл бұрын
OMG! Thank you, simple, easy to process explanations are rare. I appreciate it!
@omom4248 Жыл бұрын
You gorgeous 🎉
@yt_bharat2 жыл бұрын
Excellent teacher and superb communication
@jordanj75906 жыл бұрын
your pictures and humor help immensely !
@xochitlramirez53337 жыл бұрын
You really helped me understand math for my accounting class. You are the first person that I have understood. Could you do any videos for math classes?
@TheSmilingali7 жыл бұрын
Tyler you are really good. Keep it up for such a great explanation .
@joshgust32 Жыл бұрын
Weighted average is an average resulting from the multiplication of each component by a factor reflecting its importance. It's my understanding that averaging the individual items that can be grouped is not a weighted average, it's just an average of the items as opposed to an average of the groups. A weighted average is used to express that a thing is more important ("weighs more in the equation") because of some attribute. For example: CASH might be weighted as 5x and STOCK weighted as 2x against REAL ESTATE equity in a weighted average of assets for a group considering liquidity as important.
@lelele22894 жыл бұрын
I think it'd be a good idea to explain why someone in real life scenario would use weighted average over regular average. Not saying it's useless just so viewers can make sense of the whole thing better.
@stellaluceat73352 жыл бұрын
I’d really, REALLY appreciate a walk through of standard deviation done by YOU. So far, no explanation has really hit home. Please and thank you.
@ajtrott12 жыл бұрын
Standard deviation is just a measure of the spread of data with respect to the average value eg the average of 49,50 and 51 is 50; but the average of 1,50 and 99 is also 50. But there is much greater 'spread'/distribution of data (from the average value) for the latter! This is measured by standard deviation.
@hemaupadhyay41607 жыл бұрын
ur videos are awesome. Its seriously helped me a lot.thanks Tyler
@alexkorinth64594 жыл бұрын
I was watching this to figure out a dynamics problem, and I got whiplash when he went "And now you can calculate atomic mass" like whoa there buckaroo, that's not my department. Then I remembered this is a chemistry channel.
@Kwintessential211 ай бұрын
Very clear explanation
@mohammadrahmat941210 жыл бұрын
thank you very much , saw alot of examples and videos but none of them made the concept of weight clear as much as you did cuz in some situations weight isnt given and i was wondering how to calculate but not anymore now :)
@amalalife19933 жыл бұрын
You are a great man! Thank you 🙏🏼from Kuwait 🇰🇼
@sadriehgo3 жыл бұрын
Very simple and easy understanding video, thank you
@n.s.karthik56285 жыл бұрын
Wow, your explanation is amazing. Thank you.
@user-ij8yu5zz6k5 жыл бұрын
Thx a lot!!! I finally understood these topics.😆
@omarmowafy96132 жыл бұрын
bro i like your way of talking , hope i will present like you one day
@brianaranha48704 жыл бұрын
Really well explained and graphically represented. Kudos
@lydiaaustin220411 жыл бұрын
Are you going into teaching? I'm a chemistry student and your videos have given me a much deeper understanding of chemistry and pass many tests!
@namratachauhan97408 жыл бұрын
Explained very clearly and extremely helpful :) Thank you
@danielaschalew Жыл бұрын
you are life saver
@sd1556 Жыл бұрын
love your videos, you're saving me in chemistry class. Thanks!!
@harifans44294 жыл бұрын
Thank you thank you thank you thank you, I really needed help and you helped me thanks I really appreciate more than you think
@akachimbogu20638 жыл бұрын
thank you Tyler......you are such a good teacher
@moeShuaibi4 жыл бұрын
Thank you, you have a gift of teaching.. If Lemonas were real I'd buy you one
@genfaamanfunzii26233 жыл бұрын
What kind of calculator are you using because when I multiply 0.11 × 4000 I am not getting your numbers
@moeShuaibi3 жыл бұрын
@@genfaamanfunzii2623 I think because he rounded up the numbers: • @ 6:15 the real exact answer is 3,431.8181818182, if rounded up the answer will be 3432 • @ 7:19 percentages of each group of Lemonas is rounded up/down (i.e. exact percentage of Yellow Lemonas is 72.7272727273, rounded up 73) • @ 8:55 the answer with rounded up/down percentages is 3430, he used the answer with the exact percentages (3431.18181.. , rounded up 3432) because the percentages as mensioned before are rounded up/down. Is that what confused you? Or are you confused more ? 😂
@genfaamanfunzii26233 жыл бұрын
@@moeShuaibi I must be doing something wrong, because I tried again and got the same number you got, I understand the concept of rounding off the number. Thanks
@niranjanwjames9106 жыл бұрын
Very clear explanation. Thank you Tyler.
@charleshaines78203 жыл бұрын
I just found it strange how there are four shirtless bodybuilders surrounding a little kid.
@joselene18848 жыл бұрын
For some reason, for weighted average at my university, we have to divide by the added up percentage (100) in the last problem you showed us how to do
@virtuous__woman75 жыл бұрын
Thank you for this great explanation!
@LegendaryX300010 ай бұрын
incredible and fantastic learning experience in this one video!
@addy74643 жыл бұрын
Very well explained.
@daviddowner28699 жыл бұрын
really helpful and helped me with a homework assignment thanks
@Foxhiglord7 жыл бұрын
Your perception of the 'regular average' is completely wrong... Atleast as far as I know and have learned.
@osarhiemeniyare46786 жыл бұрын
seriously i wonder how he came up with that he should be take this video this down
@samanthahill41525 жыл бұрын
@@osarhiemeniyare4678 Can you guys explain it then it the the correct way instead of just saying its wrong ? not being rude but it would help some people out.
@mwilson96725 жыл бұрын
Samantha Hill This is late, but the way that I learned to do averages in middle school was to add everything up and divide by the amount of things there were. I don’t know why he did 100 + 300/2 (for the kids one), because that is not what I learned as a “regular” average. I see where it comes from, but it is not correct average wise. What I would have done is added 100 + 100 + 100 + 100 + 100 + 300 /6, as he did for the “weighted” average.
@gopeshsharma54325 жыл бұрын
@@mwilson9672 what he meant by 100+300/2 is that, if you've 2 groups, one who's average weight is 100 pounds and another who's average weight is 300 pounds and if you're asked to find out the average weight of the two groups then you simply cannot do this 100+300/2 calculation, that would be wrong, because the number of people in each group also matters while calculating average and people commonly makes this mistake of ignoring the number of people in each group, that's why he took that example. Lastly your concept is clear. This is just to explain why he did what he did.
@fatimapeaceful5 жыл бұрын
This is because in "rdgular average" he DOESN'T take into account the number of things. Hope this helps
@renan68272 жыл бұрын
Great explanation!
@Muuip7 жыл бұрын
Excellent!Very helpful!Thank you.
@guitarkahero48853 жыл бұрын
Nicely explained. Thanks for your efforts.
@dr.ankita4 жыл бұрын
Very beneficial. Thank you for posting :)
@sciencenerd76392 жыл бұрын
beautifully explained
@JoshuaCB198711 жыл бұрын
just saved my life. thanks!
@smitchovatiya26016 жыл бұрын
nice use of technology I can more connect with you and your way of understanding is way to easy. thank you
@veerutekure8 жыл бұрын
thank you very much, contents of the video is very helpful in clearing the basics doubts.
@TungNguyen-vl9kr Жыл бұрын
what a very great video. thanks so much
@FM-dy9li3 жыл бұрын
Voici les différents intervalles de catégories de poids. Here are the different ranges of weight categories. Very Light (less than 65kg (143 lbs). Light 65kg/74kg (143 lbs/163 lbs). Average weight for a man is 75kg/83kg (165/184 lbs). Light Heavy 84kg/95kg (185/210 lbs). Heavy 96kg/119kg (211/263 lbs). Super Heavy 120kg (264 lbs or up).
@krishnahingoo27728 жыл бұрын
you are awesome mate. thank you
@SunilDavuluri4 жыл бұрын
Maybe I am wrong, but in your regular avg example you only took one kid and one adult and divide by 2, which is average (Sum(quantity)/count ) and weighted average you took the weight of 5 kids and one adult and divided by 6 which is also an Average. sum(quantity)/count, Not weighted average. The correct example is the percentage example wherein you are giving "Weight" to a particular subject based on importance, number of cars being the weight and hence give it a larger percentage.
@ginjackson80925 жыл бұрын
I love you Tyler! You make this so simple!
@anmoljain12043 жыл бұрын
Clearing concepts👌👌
11 жыл бұрын
Thanks for the answer, I knew I couldn't be the only one. My guess is that he is simplifying what I (and probably you) would consider a weighted average. If you understand this, you could, with some thinking, for example calculate the average salary of men and women, taking into account their professions, and therefore showing the average gap between men and women with the same profession.
@pratiksaha25928 жыл бұрын
examples use by u r quite funny,interesting and INFORMATIVE thank u so much
@ITSMRMINE Жыл бұрын
Bruhhh, this video must have taken pounds of time. Over the top, lezz goo
@aakritkashyap5897 жыл бұрын
thank you sir I will be always thankful to you for showing me such a good kind of knowledge thank you and i watch your each n every vedio thank you I really appreciate you
@AbdulQadir-gf5nv2 жыл бұрын
Thanks a lot for excellent video
@sadhguruwisdom58466 жыл бұрын
Excellent explanation!
@milligangirl9 жыл бұрын
Great job Tyler DeWitt!
@prasanraj41087 жыл бұрын
great job buddy many r getting help through ur videos bravo man
@alexrosen87627 жыл бұрын
Great explanation! Thanks a lot :-)
@PeriMedic111 жыл бұрын
No, it is not unique to Sweden. I spent 11 years as an algebra teacher, and I was confused by his terminology. His definition of weighted average would be what I taught as "average": you total all individuals, divide by the number of individuals, and there is your average. Your explanation matches mine. Maybe it is different at MIT, or when you are a PhD (no sarcasm intended).
@sulaimansafdar84916 жыл бұрын
Great video.. Have a question about your example with using the percentages. To get the answer in percentage and not in pounds, do we simply divide the answer in pounds by 100 to get the percentage?
@dantristan82714 жыл бұрын
Very Helpful!
@unrealr6846 жыл бұрын
Great video! Nice explanation.
@SeverSava7 жыл бұрын
... all you did mate, is to calculate the regular mean. That (100+300)/2 is from nowhere and has no meaning. In the end you explained in a complicated way how to do a regular mean. ....
@obriantguyful6 жыл бұрын
He's calculating the average weight if there was 1 kid and 1 father. (100+300)/2 = 200lbs. He didn't necessarily get it from 'nowhere'. Just using it as a simple explanation of how to calculate an average of something.
@laurencemoore94808 жыл бұрын
oh my god you helped me so much thank you so much tyler xoxoxoxo
@bilalmuhammad51126 жыл бұрын
Such a awesome lecture much appreciate
@bhtr1008 жыл бұрын
Excellent teaching
@aamirmajeed821810 жыл бұрын
fantastic ....
@HannoWg8 жыл бұрын
That was well explained, keep up
@devcarretero44867 жыл бұрын
Best explanation ever!
@ankushkachhave34845 жыл бұрын
Great explanation sir,will u plz make video for difference between percentage and percentile?
@squidb88 жыл бұрын
Thank You Tyler that was great stuff
@kalki30604 жыл бұрын
I have a doubt,why do we convert the percentages into decimals before multiplying them with the weight of the cars?