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David
  • Member for 5 years, 7 months
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4 votes
1 answer
2k views

Lagrange polynomial in 3-D. Variable of interest is a vector.

3 votes
2 answers
575 views

Correlation between 2 random variables and $\cos(\theta)$ on vector space

3 votes
1 answer
222 views

Probability that amoeba population dies out completely - why can't the probability be 1?

3 votes
3 answers
57 views

$\binom{n}{j} \cdot (n - j)$ when $j = n$

2 votes
3 answers
215 views

How to seat $n$ people in $n$ seats if each person must take a seat next to an already sitting person?

2 votes
2 answers
51 views

Expectation of the minimum of two continuous random variables - using the joint pdf

2 votes
2 answers
88 views

Rolling a dice a maximum of two times, what is the expected sum of values?

2 votes
1 answer
78 views

$f_X(x) \neq \frac{2 \pi \sqrt{R^2 - x^2}}{4\pi R^2}$? $X$ belongs to points uniformly distributed on the surface of a sphere.

2 votes
0 answers
55 views

How to derive a generic formula for $\sum_{k=0}^n k^p$ for any $p$? [duplicate]

2 votes
2 answers
51 views

What is the difference between $P(S = s, N = n )$ vs $P(S = s | N =n)$

2 votes
2 answers
71 views

Maximizing the quantity $f = -20p\cdot q + 9p + 9q$

2 votes
1 answer
97 views

Why is $\operatorname{Var}(X_{(1)}) = \operatorname{Var}(X_{(n)})$ for i.i.d $X_1, \ldots, X_n \sim U(0,1)$?

2 votes
1 answer
101 views

Expected number of tosses of getting $n$ heads in a row

1 vote
3 answers
134 views

jointly discrete continuous & discrete probability - conditioning on a range

1 vote
1 answer
32 views

Probability of choosing an edge twice in a tetrahedron

1 vote
1 answer
214 views

Extension of median minimizing the sum of absolute deviations (the $L_1$ norm)

1 vote
1 answer
33 views

How does $r$ for univariate regression relate to the general definition of $R^2$?

1 vote
0 answers
101 views

Order of accuracy of least squares for computing gradients

1 vote
1 answer
182 views

Expected number of tosses to get 2 heads in a row - what is wrong with my approach?

1 vote
1 answer
20 views

If event $A$ happens with probability $p$, then when is event $B$ guaranteed to not be mutually exclusive with $A$?

1 vote
1 answer
53 views

Maximum likelihood estimation steps

1 vote
3 answers
152 views

Probability that $\max(X_1, \ldots, X_n) - \min(X_1, \ldots, X_n) \leq 0.5$

1 vote
1 answer
21 views

What is the simplest way to compute $f_Z(z)$ when $Z = \min(X, Y), X \sim U(0, 5), Y \sim U(0, 10)$?

1 vote
2 answers
160 views

Strict (or lack therefore) concavity of square root function

1 vote
2 answers
64 views

How to factor $ 1 - 3x + x^2 + x^3$?

1 vote
1 answer
37 views

Probability of median of 3 values drawn from $U(0, 1)$ being less than $c$?

1 vote
2 answers
49 views

Ball painting probability

1 vote
2 answers
18 views

What is meant by $\log_2 X \sim N(0,n) \implies \log X \sim N(0, n (\log 2)^2)$?

0 votes
1 answer
36 views

Why is $\exp(n/2 * (\log 2)^2) \approx 1.27^n$

0 votes
1 answer
66 views

Why is the marginal pdf of $x$ on the surface of a sphere uniformly distributed, intuitively speaking?