Probability (part 3)

[Slackerx89]

Cool calculator move

[victim0001]

probability of not getting head is very high

[eurojoe9]

i understand that for example when your looking at getting "exactly one head" but what if your looking at bigger numbers like 120 when you don't have time to type out all of the possible outcomes on an exam. is here a formula that you can use to determine the total possible outcomes?

[benjtoa]

omg this just made sense!!!

[pattttttrick]

If you have a TI calculator, you're allowed to download an emulator with the rom corresponding to your TI.

[meschool]

I like orange juice

[iamtheplauge]

What's the probability of getting no tails when you flip an infinite number of times? Whoever can answer this gets a cookie. :)

[Franchan10]

@iamtheplauge

negative infinity



[SyaukatTeh]

@iamtheplauge infinity over infinity? cuz its never ending.. you flip till like forever so there is forever results.. lol?

[DarkLuster007]

@iamtheplauge answer: ∞/∞

..lololol

[absar45]

your writing is worse

[djjmria]

lol that calculator

[MsNJohnson]

Who are your parents????? Give them a big kiss for your Youtube family!!!!!!

[Sporksrule120]

Thank you so much for posting this video!! I am in 6 th grade in 8th grade math unit, and we have been learning probability 2 hours a day for 1 week and I did not get any of it. Watching this 10 minute video I figured out everything. Thank u so much!!!!!!!!!!!!!!!!!!!!!!!!!!­!!!!!!!!!!!!!!!!

[av733]

Cheapo windows calculator!? bill gates wont be happy!

[StealTeal]

Could you also cover Negative Binomial, Geometric and Hypergeometric distributions? All sort of similar but not... and when to use them, etc.? THANKS! :)

Also... moment-generating functions are confusing... and Chebyshev's Theorem (vs. Empirical Rule & Z-Score)...

[Shawn9081]

oh my goodness look at all the parts to probability, this will be a long unit.

[yeepieyeepiedoo]

I dont know how you can come up with a probability for the free throws.

Just calculate how many throughs of a fair coin you need, in order that the difference in module between the percentage of occurence of a previously choosen side and teoretical value of 0.5 is smaller then 1%, with a probability higher then 99%......

Anyway, you would need more then 250.000 throughs....

[shyment3]

i have to send this video to our teacher to know the right of teaching

[TheUmairjafri]

I totally got lost in the middle of the video. i didnt like the explanation much. :/

[TICOMMECA]

im in a statistics contest in our university. this would greatly help. thanks

[doritoface123]

Flip a coin with your girlfriend, you either get head or tail, you win either way!

[alabader741]

who is the idiot who clicked on the dislike >:(

[av733]

@alabader741 probably bill gates

[greatestwhoeverlived]

shouldn't each shot have the same chance of getting a basket? is the probability of a 3rd shot really affected by the probability of the 1st shot? isn't that a "gambler's fallacy" as that guy said in the 1st video?

[Draconiandreaweaver]

@greatestwhoeverlived Well, you are right in the fact that the 3 events are independant, but that is why he multiplied the probabilities (0.8 * 0.8 * 0.8) this shows that the events are independant :)

[TheTayyab1]

thanks for posting...its very helpful...

[marceldupreez]

Just click "View" -> "Scientific" on the "el cheapo" calculator to get the exponent ;)

[maksman93]

thanks very much for clarifying that, my statistics teacher cant teach at all so you're a life saver ;)

the vid's very clear but i think you should put the probability of not getting a basket as B' (B-dash)

[mrvlhs]

You do have scientific calculator on windows. Check out the menus on the calculator. Windows doesn't suck that much lol.

[trangnguyen1092]

@mrvlhs why needs calculator when you can do that in your head.

[PinkZeppelin65]

Its 8*9*10 = 720. See combinations and permutations (in this case its a permutation) to understand the concept of such problems

[Angelrulesss]

just a question how many compinations can numbers 0-9 make when they are used 3 times. like 548, 568, 395 Ect.

[UberN3rdDillon]

well you have three places and each place has 10 different options so that is 10*10*10 = 1000 different combos.

[Budisawsome]

I'm not sure if that is correct because you didn't count for the different orders of the numbers.

But, like i said I'm not sure.

[kuntakinte90]

yes it is correct :D if you think about it you have 1000 numbers from 0 (combinations of 3 zeros) to 999 (combinations of 3 nines). the fact is that you're counting numbers with just two or one digits as combinations of zeros and the numbers (for example, the number '67' is the combination of 0+6+7). so if you want to count the real numbers of combination with 3 digits you should count the numbers from 100 to 999, so it should be 900.

[JLack84]

UberN3rdDillon answered your question correctly, however I just wanted to note that if you're finding combinations in which repetitions aren't permitted (i.e. not being able to use the same # more than once) then the answer would be 10 x 9 x 8 combinations or 720 ways of using the numbers 0 - 9.

[KidCollege]

900 combinations

[prsydaus]

that cheapo windows calc? --> there's an option to view the scientific calculator on it! -- gee that beats my MAC i'm using now :-(

BTW: Love your vids and help me a lot --- and I'm paying $1000 for my university subject via correspondence!!!! Why when I can learn from YouTube? These edu institutions are such a ripoff! But I need the paper...

[MissMinkyTheOriginal]

ahahhaha just like me

[mah927]

Thanks Sal... I am reviewing prob and combinations for an exam and helps a lot...your work is inspiring...

[Nanumir]

awesome!

[lascaux2123]

Hey, if you go to 'view' on that calc you were using at the end of the video, you can select 'scientific' and it has everything you need. Good videos by the way, I am planning to watch the entire 'probability' series. Very clear explanations, unlike in most books.

[mukifurlan]

@lascaux2123 and teachers