Probabilities from density curves | Random variables | AP Statistics | Khan Academy

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Examples finding probabilities from probability distributions for continuous random variables.
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[@jjmendez007]

nice and succinct and quick examples with clear explanations.

[@xbbyAJ]

i was learning this at my add maths tuition and then when i opened youtube, khan uploaded this vid seconds later! gr8

[@gabrielrivera9363]

Can somebody answer where the 0.25 value came in the Y value in the density curve please ???

[@SamGal-bw3sm]

0.25 is the probability density value, in this case they all have 0.25 values. hope that helps a year later :)

[@ms.vsbeautytutorials8738]

What numbers are calculated to get the 34%, and the 50%. This is where I get confused, when there is not a clear path on what numbers will be computed to get the answers. Also, why is everything under the curve added up to 1?

[@demario0]

Please
WhatsApp is the software you are using to do this video ?

[@demario0]

What

[@DianaIca]

how is that 34% ??

[@123159true]

Diana Ica he's said P between sd below the mean and sd above the mean roughly 68.2% in normally distributed. I'm not sure wait for correct answer.

[@demario0]

James
You are correct

[@DianaIca]

James thanks for the answer :)

[@demario0]

Diana Ica you are welcome

[@mohammedhamed1714]

how did he calculate 68.2 ?

[@mrtemmiebro9701]

IM THE SECOND COMMENT

[@appledough3843]

I can cure cancer now.