Constructing a probability distribution for random variable

Constructing a probability distribution for random variable | Khan Academy

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10 жыл бұрын

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Пікірлер: 127

@averywilliams6941 2 жыл бұрын

This same concept was taught horribly in my class so I completely didn’t get it before. After watching your video, I understand it! Thank you.

@RandyDaGamer 3 жыл бұрын

Thank you so much Khan Academy. When I grow up and get a good job/business; I will donate to you guys.

@reem461 2 жыл бұрын

Short and simple I love it, you explain it better than my teacher who spends two hours in class to explaon this

@schrodingersgunna6390 2 жыл бұрын

Your english teacher also failed teaching you 😂😂😂😂

@NishantKumar-vx9zd Жыл бұрын

Only mistake i found i her comments is explain. How can you judge his English on the basis of single mistake

@TeofilWhite Жыл бұрын

@@NishantKumar-vx9zd You are no one to judge when you can not speak English yourself.

@somber087 Жыл бұрын

Have you all heard of typo?

@internetduck1114 Жыл бұрын

My 2nd semester teacher just speedruns it and I'm slow paced

@jasonromd.lacidajr1348 3 жыл бұрын

I love the part where OCD took place

@tuhinsuryachakraborty 4 жыл бұрын

These are actually very helpful for my upcoming boards exam. Thank you

@alissalister5549 2 жыл бұрын

Thank you so much for this! You made an intimidating task not intimidating!!

@kzvalencia7283 3 жыл бұрын

OMG I LOVE HOW YOU EXPLAIN IT MY GOSH EVERYTHING U SAID I UNDERSTAND THAN MY TEACHER TEACHING IT AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH

@totalblank8712 3 жыл бұрын

thanks a lot, I finally understand the concept

@eleazararce5716 Жыл бұрын

I'm watching all 19 videos so I can become stronger in math

@1nfamyX 4 ай бұрын

"Hes too dangerous to be left alive!"

@daniyaljawed7409 2 ай бұрын

@@1nfamyX HAHAHAHA😂

@henz8303 2 жыл бұрын

I just got so confused how they got the numerator value for x.. now i get it thanks to you

@vggoodvibes384 2 жыл бұрын

Thank you so much! I've learned a lot! ^^

@kumarsubramanyam9210 4 жыл бұрын

Thank you very much , very easy to understand

@evamaepanta-on9908 3 жыл бұрын

Thank you so much, God bless you

@vaishas3905 3 жыл бұрын

Excellent class 🤗 ur 👀 voices too.. Superb

@jeremynx 3 жыл бұрын

THank you so much, the best video !!!

@sheilamaemolleno9056 4 жыл бұрын

thank u so much mas naintindihan kopato😍

@usmanology438 2 ай бұрын

the same thing was taught to us in the class. but i didnt understand it well but trust me after watching your video i understand it well. TYSM

@jennyleepunan798 7 жыл бұрын

a big thanks to this video

@80srican71 2 жыл бұрын

thank you for some reason I understand you better than I do my instructor

@pomfrittbroccoli Жыл бұрын

Very Very Good! Thank you!

@qbitechwriter Жыл бұрын

Beautiful, simple, understandable explanation. Thanks.

@wasteddemise2286 10 ай бұрын

Yesss

@kathlynbayron1634 2 жыл бұрын

You're so good. I understand it now.

@mishteeshanna3779 7 жыл бұрын

thank you so much so heplful

@Tony-hj7bm 2 жыл бұрын

thanks to u i finally understand this thing

@brookecooper7332 2 жыл бұрын

describe how to create a probability distribution of a discrete random variable and its purpose

@Scarlett-gi7hk 3 жыл бұрын

WOW, thankyou!

@teamfour2699 6 жыл бұрын

Thank very much

@karimalyaman9849 6 жыл бұрын

thank you

@drallisimo34 6 жыл бұрын

great!!!

@saurabhchoudhary4572 Жыл бұрын

His voice is so deep

@dypsking3414 2 жыл бұрын

You're the best 💕

@gddfhjiufcv 6 жыл бұрын

This is a probability mass function. A distribution function is cumulative and hence tends to 1 as the values of X rise.

@hmz01_ 6 жыл бұрын

a distribution function does not need to be cumulative

@prashantdogra48 4 жыл бұрын

yes this is a pmf but is doesn't need to be cumulative

@natte431 9 ай бұрын

use playback speed 1.5x ur welcome

@BigDaddyHC 2 ай бұрын

Literal savior right here and nobody gonna talk about it?

@electricaladhd4237 Жыл бұрын

I like how if h is 0 and t is 1 he wrote the correct binary representations of 0-7 in order. Probably not on accident. I’m sure it felt natural to him.

@UAEboy327 7 жыл бұрын

Thanks for the helpful video.

@HamzaKhan-mf1nc 5 жыл бұрын

Are you a product of Samuel l jackson and john mayer?

@lorrainegalaura6340 7 жыл бұрын

Thank you for this!!!

@CH.R222 2 жыл бұрын

thank,s a lot !

@GymMotivational001 2 жыл бұрын

Nice explanation

@_s_d.d7223 Жыл бұрын

Thank you so much 😎

@zxne585 5 жыл бұрын

life saver

@user-qv8mx5pu4s 6 ай бұрын

Thank you soo much 🫶

@steveshaver4000 Жыл бұрын

Hi, Are you sure that the initial probabilities are equal? It makes sense that the probabilities are equal for one coin toss, but for “consecutive” coin tosses, wouldn’t it be a good idea to take into account that it is less probable to get the some side more than once consecutively?

@wybornebasil Жыл бұрын

you’re not less likely. its a 0.5 chance every single time you flip the coin

@syedrhaque765 Жыл бұрын

@@wybornebasil Exactly, and it is because each toss is completely independent from the outcome of other and thats is why its called "fair".

@aaronjamesmanahan3227 6 жыл бұрын

I think we can include the HHH for the P(x=2)? cause it has the 2 heads so the answer is 4/8 or simply 1/2?

@hmz01_ 6 жыл бұрын

no its EXACTLY 2 heads, no more no less. If for example x=6, it can only be 6 heads, not 5, not 7, but only 6. lol this prob is no use now because your test or exam is long over ahaha- but knowledge is worthwhile nonetheless.

@mohammeda.raqeeb3110 5 жыл бұрын

Hamzah Shafi Can we make P(x=0) for HHH alternatively for (TTT) as in the video, no? As nothing will change from which one starts. The probability distribution will not change.

@mohammeda.raqeeb3110 5 жыл бұрын

Hamzah Shafi What X values actually means. Why he put it as 0,1,2,3?

@iman3622 4 жыл бұрын

1:10, okay I have a really dumb question but bear with me. Why do we consider the outcome with 1tail and 2 tails as 3 different outcomes for each case? Why does order matter here? How can we identify when does order matter?

@iman3622 4 жыл бұрын

@Radio Music think I figured out the explanation. Each attempt has two possibilities. That makes the total possiblity as 2*2*2 =8

@haripokhrel9211 6 жыл бұрын

I love you sal I wish I could donate at least 3$to you I don't have facility here...m so sry

@fahada1921 7 жыл бұрын

Thank you

@princeheavenb.valdez1823 3 жыл бұрын

Can this guy be my math teacher???

@avivran1198 4 жыл бұрын

It should be CLEAR that all the above results are heavily based on the fact that we are using a fair coin (which is indeed written) Why, since P(Head) = 0.5 and P(Tail) = 0.5, so every experiment result is always 1/8 [which is the result of ((1/2)^3)] which is NOT explained and this MUST be written in the title and be VERY clear. If P(Head) = 0.7 and P(Tail) = 0.3 then all above calculations are INVALID

@mohamedelawady2512 Жыл бұрын

Thanks

@maleeharana3582 4 жыл бұрын

You solved a “masla e kashmeer “ for me 😁😁 thanks

@dewantahmid95 6 жыл бұрын

This channel is very useful! Thank you Khan Academy.

@maxsmith4412 2 жыл бұрын

isnt this basically a normal probability distribution? the bell shaped one?

@arnewton6102 6 жыл бұрын

A code consists of three digit numbers what's probability that the number randomly chosen is (a) even three digit number.. (b) divisible by seven Sir plz solve for me

@CERTIFIEDBABEWRANGLER 4 жыл бұрын

Hows it going ?

@kd013n 4 жыл бұрын

@@CERTIFIEDBABEWRANGLER well meme'd, my friend.

@Gwynbleiddsanity 4 жыл бұрын

it's been two years already have you solved it already?

@adonaymengesha1518 Жыл бұрын

Yttttttuጅክፕግቭችችቭ ችችቭትይይይይይይኅግኅህፍፍግግስተይፍይቱይዩኡኡኡኡኡጅህትቶቶኦግዪኢኢቲቲኢኢቲኢጎርፍፍቲትቲርርሩኡቱኡኡፍፉፍፉፉኡድሪርድር4ግህይጀኡርድህርኀ ጅምህ ህ ኡኡኡ ኅ ኢኢዊህርሩፍፍዩኡግግትቲቱግፍፉጉኡኡጉኡኡፉጉ ፍፉግጉጉኡግግጉ ኡፍፍፍፍፍፍፍፍፍፍፍፍፍህፍህችችች ድፍፍፍ ፍ ኅህ ግጅፍፍጅፍጅጅስእእዥዥዝዛዥዥ

@vachan-maker 7 ай бұрын

i think answer to question a is 4/9 as u have to get 2,4,6,8 out of no.s from 1-9

@kellyyu4638 Жыл бұрын

Cool

@absolutechaos1442 7 жыл бұрын

Thank you so much

@htunlwin Жыл бұрын

same to binomial distribution .

@alicia29559 10 жыл бұрын

Hey can you do a video about diagnostics????

@nkululekomadonsela4418 6 жыл бұрын

Doesn't this histogram show continuity?

@cruiserisingsoul 5 жыл бұрын

You sound like Corey Taylor

@ericbenevides2913 5 жыл бұрын

Honestly a bit

@burhanmustafar7674 7 жыл бұрын

am i crazy or u sounds like john mayer's speaking voice, damn i got john teaching me stats!! :0

@rohithanagaraju9890 6 жыл бұрын

well Explained. but dragging the concepts. could have been completed in less time.

@chanderman85 6 жыл бұрын

Rohitha Nagaraju he does that for people who cant grasp it as quickly my dude

@Manodragon 10 жыл бұрын

yey statistics

@cheesuekimbop943 3 жыл бұрын

what if the dice were rolled 4 times does the denominator (is that what u call the 8?) changes?? please I need answers

@marcorossi2268 3 жыл бұрын

Yes the number of outcomes (denominator) is 2^n In the video n=3

@vachan-maker 7 ай бұрын

yup 2 raised to 4, so 1/16

@pallavigorle6001 6 жыл бұрын

Add problem

@richardadamwais9734 3 жыл бұрын

thnaks but actually the probability is complex

@animefingerstyleguitararlo5782 4 жыл бұрын

CSA students where you at?

@alexkuligowski4092 5 жыл бұрын

But what's P(X=x) though?

@fadimacamara479 5 жыл бұрын

Alex Kuligowski i believe X is the the outcome or value and x is the possibility associated with it. So for a standard die thats has 6 faces, the possibility of it landing on any number, lets say 5 (X) is 1/6 (x).

@elissabella 2 жыл бұрын

I am here just for his voice haha

@yasmijnbos3625 Жыл бұрын

i love you

@yalllistenup2577 3 жыл бұрын

Why am i here, it's still vacation

@adedayobadmus6258 Жыл бұрын

@hillol13 4 жыл бұрын

Graph is not clear

@user-tq6my4sx1g 5 жыл бұрын

Video is loading too slow. I’m not sure what is the cause. Other videos are playing okay.

@annandiaye964 4 жыл бұрын

very helpful!!!!such a sexy voice tho!

@nicolenavarro7043 2 жыл бұрын

i'm a little bit confuse where 8 come from ???

@sourbean1207 2 жыл бұрын

there's a total of 8 possibilities

@vachan-maker 7 ай бұрын

or for a coin flips its gonna be 2 raised to n where n is no of coins used

@ihhh3631 7 жыл бұрын

Audio is broken

@tinykox6133 3 жыл бұрын

Your speakers is broken

@st4pps 2 жыл бұрын

why did you have 8 of them?

@galerights8983 2 жыл бұрын

that's just how it is

@vachan-maker 7 ай бұрын

or for a coin flips its gonna be 2 raised to n where n is no of coins used

@user-gb6iz9ot1g 2 жыл бұрын

John 3:16 For God so loved the world that he gave his one and only Son, that whoever believes in him shall not perish but have eternal life.

@shawnbixenman 3 жыл бұрын

im dying brb

@monicamwape1902 2 жыл бұрын

Good video but irritating voice

@ianjaydelosangeles3173 9 жыл бұрын

FU why cant i hear a sound everytime i play ur video

@urjadwivedi6379 8 жыл бұрын

That's not their problem get your devise checked :)

@ILoveMySillyBanana 8 жыл бұрын

+Ian Delos Angeles never had a problem with these videos.

@achaljoshi007 8 жыл бұрын

*DEVICE

@asham17 7 жыл бұрын

turn your volume on

@hmz01_ 6 жыл бұрын

stfu grammar nazi, its obv what she meant

@jeffreynoel937 3 жыл бұрын

Dude, why tf did you write out heads and tails? No one is going to do that for any large number of sequences. Imagine writing out 32 trials with 23 successes. You'd spend all day doing one thing.