List questions from expected-value

Published on 12 Apr 2026 - 12:41

42

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How many days do we have to wait?

Published on 13 Apr 2026 - 1:42

19

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Problem with expectation of a transformed random variable

Published on 09 Apr 2026 - 21:35

72

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Why does $\mathbb{E}[X^2]=\int_{-\infty}^{\infty} x^2 f(x) d x$ follow from the definition of $\mathbb{E}[X]$ for continuous random variables?

Published on 15 Apr 2026 - 15:42

180

Views

Expectation of normal c.d.f. of a normal random variable

Published on 26 Mar 2026 - 11:00

42

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upper bound over multiplication of two expectation

Published on 11 Apr 2026 - 20:15

225

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toy collection question

Published on 12 Apr 2026 - 16:48

104

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Expected value to have no heads

Published on 12 Apr 2026 - 18:47

177

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Probability of guessing correct number between 1-100

Published on 15 Apr 2026 - 18:49

71

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Does $E^2(X)/E(Y) \le E(X^2/Y)$ hold

Published on 13 Apr 2026 - 6:09

139

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Determining bet sizes given odds

Published on 17 Apr 2026 - 3:42

179

Views

Product of 2 dice game

Published on 16 Apr 2026 - 14:19

1.2k

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$\int_0^{\pi/2}\int_0^{\pi/2}\frac{(\tan\alpha)(\tan\beta)}{\tan\alpha+\tan\beta} d\alpha d\beta=(0.9999999913...)(\pi/2)$? Seriously?

Published on 17 Apr 2026 - 11:34

83

Views

Question about Expectation

Published on 09 Apr 2026 - 3:05

361

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Card game Puzzle

Published on 18 Apr 2026 - 2:04

List Question

Average return from rolling two 10-sided dice

How many days do we have to wait?

Problem with expectation of a transformed random variable

Why does $\mathbb{E}[X^2]=\int_{-\infty}^{\infty} x^2 f(x) d x$ follow from the definition of $\mathbb{E}[X]$ for continuous random variables?

Expectation of normal c.d.f. of a normal random variable

upper bound over multiplication of two expectation

toy collection question

Expected value to have no heads

Probability of guessing correct number between 1-100

Does $E^2(X)/E(Y) \le E(X^2/Y)$ hold

Determining bet sizes given odds

Product of 2 dice game

$\int_0^{\pi/2}\int_0^{\pi/2}\frac{(\tan\alpha)(\tan\beta)}{\tan\alpha+\tan\beta} d\alpha d\beta=(0.9999999913...)(\pi/2)$? Seriously?

Question about Expectation

Card game Puzzle

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