Question

Can I calculate $E(X^2)$ if I know that $X$~$B(1, \frac{1}{3})$ (binomial distribution)

score 706 · Answer 1 · 2026-04-16 11:05:09

706

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Can I calculate $E(X^2)$ if I know that $X$~$B(1, \frac{1}{3})$ (binomial distribution)

Published on 16 Apr 2026 - 11:05

score 645 · Answer 2 · 2026-04-14 01:43:09

645

Views

Given a fair coin, on average what is the number of tosses needed to get 3 heads in a row?

Published on 14 Apr 2026 - 1:43

score 105 · Answer 3 · 2026-04-14 11:12:23

105

Views

What does the circumflex symbol mean in an expectation.

Published on 14 Apr 2026 - 11:12

score 35 · Answer 4 · 2026-04-09 04:04:42

35

Views

Equation with expectations and squares

Published on 09 Apr 2026 - 4:04

score 1.3k · Answer 5 · 2026-04-10 14:05:19

1.3k

Views

difference between expectation of a random variable in measure theory and in regular calculus probability books

Published on 10 Apr 2026 - 14:05

score 88 · Answer 6 · 2026-04-13 19:05:05

88

Views

Expectation value for the length of a randomly-generated sequence of letters

Published on 13 Apr 2026 - 19:05

score 64 · Answer 7 · 2026-04-11 02:01:25

64

Views

Problem with mixture of distributions solution

Published on 11 Apr 2026 - 2:01

score 67 · Answer 8 · 2026-04-14 09:37:48

67

Views

Finite expectation when probability of singularity is zero

Published on 14 Apr 2026 - 9:37

score 38 · Answer 9 · 2026-04-13 13:00:10

38

Views

Existence of the expectation for some random variables on $\mathbb{N}^*$

Published on 13 Apr 2026 - 13:00

score 41 · Answer 10 · 2026-04-13 21:11:45

41

Views

On the informal interpretation of the first moment method.

Published on 13 Apr 2026 - 21:11

score 3.9k · Answer 11 · 2026-04-10 00:38:30

3.9k

Views

Does taking expected value of two sides of inequality maintain the inequality?

Published on 10 Apr 2026 - 0:38

score 93 · Answer 12 · 2026-04-14 13:32:55

93

Views

Expectation of a function using beta distribution or binomial distribution?

Published on 14 Apr 2026 - 13:32

score 3k · Answer 13 · 2026-04-15 08:43:07

3k

Views

It is the case that $E[\exp(X)] = \exp(E[X])$?

Published on 15 Apr 2026 - 8:43

score 999 · Answer 14 · 2026-04-13 15:37:21

999

Views

Distribution of angle between two dependent gaussian random vectors

Published on 13 Apr 2026 - 15:37

score 49 · Answer 15 · 2026-04-10 23:08:24

49

Views

Expected value of a random function

Published on 10 Apr 2026 - 23:08

List Question

Can I calculate $E(X^2)$ if I know that $X$~$B(1, \frac{1}{3})$ (binomial distribution)

Given a fair coin, on average what is the number of tosses needed to get 3 heads in a row?

What does the circumflex symbol mean in an expectation.

Equation with expectations and squares

difference between expectation of a random variable in measure theory and in regular calculus probability books

Expectation value for the length of a randomly-generated sequence of letters

Problem with mixture of distributions solution

Finite expectation when probability of singularity is zero

Existence of the expectation for some random variables on $\mathbb{N}^*$

On the informal interpretation of the first moment method.

Does taking expected value of two sides of inequality maintain the inequality?

Expectation of a function using beta distribution or binomial distribution?

It is the case that $E[\exp(X)] = \exp(E[X])$?

Distribution of angle between two dependent gaussian random vectors

Expected value of a random function

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