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Continuous Random Variables: Mean & Variance 

MrNichollTV
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Watch more tutorials in my Edexcel S2 playlist: goo.gl/gt1up
This is the third in a sequence of tutorials about continuous random variables. I explain how to calculate the mean (expected value) and variance of a continuous random variable.
Tutorials on continuous random variables
Probability density functions (PDFs): • Continuous Random Vari...
Cumulative distribution functions (CDFs): • Continuous Random Vari...
Mean & Variance: • Continuous Random Vari...
Median: • Continuous Random Vari...
Mode: • Continuous Random Vari...
Past Paper Questions: • Continuous Random Vari...
Watch more tutorials in my Edexcel S2 playlist: goo.gl/gt1up
Visit my channel for other maths videos: / mrnicholltv
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7 авг 2024

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Комментарии : 11   
@yamax1
@yamax1 10 лет назад
Finally some clear explanation with examples. Thank you for making this video. I really appreciate it. Regards. Student from Warsaw.
@sajulasalim2170
@sajulasalim2170 9 лет назад
it was so helpful....clear, understandable,simple nd perfect tutorial..thnx :)
@matthewstehrenberger4999
@matthewstehrenberger4999 10 лет назад
Appreciate your help, great video!
@RimSelektaMusic
@RimSelektaMusic 9 лет назад
thank you
@NiiAyiteAryeh
@NiiAyiteAryeh 10 лет назад
so for all piecewise functions, you really have to add both integrals in order to find the mean and variation?
@MrNichollTV
@MrNichollTV 9 лет назад
Nii Ayite Aryeh I'm afraid so - yes. Unless you have a special case - for example, if the distribution is symmetric then you could state the mean without any calculation.
@wh1988ha
@wh1988ha 10 лет назад
Really, Really helpful. Thanks!!!
@thies2us
@thies2us 10 лет назад
at 9: 22 minutes, can you please explain how the height is 1/4 (1.18....) ?
@MrNichollTV
@MrNichollTV 9 лет назад
thies2us The formula for the height is 1/4 x, and x is 1.18...
@karimkhan1312
@karimkhan1312 9 лет назад
thank u sir
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