New answers tagged probability-or-statistics
4
votes
A probability problem involving no replacement
Here is an approach using only Mathematica functions for probability theory:
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3
votes
Accepted
A probability problem involving no replacement
Instead of constructing a new list, it's faster to just count the elements that satisfy a criterion:
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- 49.3k
4
votes
Issue with variable within Sum[] bounds
There appears to be a closed-form solution for specified values of $n$.
I haven't found the general formula for when $n$ is some positive integer. Here are the results for $n=1, 2,\ldots,8$. (Note ...
- 42.4k
1
vote
Issue with variable within Sum[] bounds
It's not really an answer.
I think that does not have finite closed-form expression in terms of very large class of special functions.
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7
votes
Accepted
How can I find Mean[data] Median[data] Quartiles[data] Variance[data] StandardDeviation[data] of a grouped frequency table
There are probably several alternatives depending on exactly what kind of statistics you want, your context, and what data you actually have. If you literally just have that table (i.e. if we ignore ...
- 31.7k
2
votes
Accepted
Solution to Stochastic Differential Equation Including Heaviside Step Function
The following works to me.
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- 27.8k
4
votes
Accepted
Sampling orthogonal matrices with eigenvalues in given range?
Let us assume the size $n$ of the wanted orthogonal matrix mat is even, $n=2k$. I will use the following fact: a real orthogonal matrix have a real Jordan normal form which is a direct sum of $k$-...
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