Random variables | Probability and Statistics | Khan Academy

it is important vedio

How I understand randomness is that it's a measure of knowing that an event will occur but being unsure about its outcome. Hence, we use random variables to map out (or quantify) the outcomes of those random events.

I'm confused. The number should be Y<= 42, as there are 7 dice. Each dice can get a max value of 6. So 6x7 = 42.

I am so glad you exist. Thanks for such a nice and clean explanation

Are these “random variables” in the room with us right now?

The question is about variables.

We would say that “height” is a variable. In my mind, “height” does not just represent different values, like 2, 45, or 75. It represents values + units: 2 feet, 45 feet, or 75 feet.

However, when we work with variables mathematically, I believe that we think of them as solely representing values / numbers. For example, we will say statements such as:

height = 2
weight = height + 4
weight = 6

It seems confusing to me to have to think about variables in 2 different ways. Could you explain if I’m thinking correctly? How do you recommend thinking about variables so that I can do statistics most effectively?

Please reply.
Thank you

what my teacher taught us is this
ex. Number of tails in tossing a coin thrice
ans. {0, 1, 2, 3}

you're literally the only reason why I'm managing to get through my business degree

gg bang

So the random variable is similiar to substitution?

as a senior in engineering i come back to khan academy occasionally after years of listening to sals voice it now has become quite nostalgic

Done

upward face lol

Can you teach at my school in every class I have for math you literally teach me everything my teachers can't explain anything clearly I took Stats in senior year of Highschool and that teacher was better then my senior year of college SMH

excellent video Khan Academy. I smashed the thumbs up on your video. Maintain up the solid work.

Example mixed Random Variable

Thankyou sir

Voice is too dope 🔥🔥🔥

Hi! Is this the engineering level Probability and statistics course? I need a place to revise all my engineering mathematics courses including differential and integral calculus, multivariable calculus, linear algebra, differential equations, probability and random variables, numerical methods. Kindly let me know if the maths section here on Khan Academy covers these courses.

i thought it was corpse husband at first 😳

so if i watched this am i going to get a 100 ?

Thank you so much!

what is the difference between random variables and events?

Better than my uni prof

Very good explanation

Hello, I always listen to your lessons, I like your speech, you explain the lesson, Please send me simpler textbooks on probability theory and mathematical statistics, from Uzbekistan, teacher Kamola

Very clear explanation! Thank you very much

I should just give my tuition to you

Rolling 7 dice, why not less than 42 but 30?? Somebody help me

Nice one

Let A and B be disjoint events and such that p(A)>0 and p(B)>0 are they dependent or independent??

I liked this video. it's so helpful

Explain in hindi

A random variable is the same an event? My book tends to use capital X as 'random variable' for probability problems and they use capital A, B, C for Events, subsets of a sample space.Furthermore, capital omega is random space for probability and sample space when discussing events.

Sorry if I made poor distinction, but I don't understand why they is a distinction.

Perhaps a random variable is a specific kind of Event where it is a 'real valued function, and similarily for random space being a type of sample space.

Khan academy is like a video Wikipedia in academic.

Be easy to learn if your voice didn't put people to sleep

Please talk hindi

thanks

Its not so clear 😑😤

I still dont get it. Lmao

Did it make sense to find the expected value of X when it is assigned by the first method, where you arbitrarily choose random numbers to enumerate heads and tails?

Very helpful this video..

him shaking the mouse like that is making me nervous irl

how is a random process defined? on the basis of outcomes?

not clear to my current situation, maybe i dont personally take this as serious as my prof. What i want is direct lesson ( formulas, examples, solution, discussion on how to get this and etc) somehow i dont find this helpful but tnx

I absolutely dont like the black bg

i always lose interest while watching khan academy

You're literally my life saver through college.

very impressive explanation

please upload problems related to it and discrete probability distribution function