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15
Math.TechQA.Club
2026-03-28 22:24:53
957
Views
Exponential smoothing and variance
Published on
28 Mar 2026 - 22:24
#statistics
#average
#time-series
#variance
462
Views
Two random coins from a hat, let $X$ be the number of heads after flipping the chosen coin $n$ times. Find the variance of $X$.
Published on
03 Jun 2016 - 17:38
#probability
#statistics
#variance
118
Views
calculate the variance and expectation
Published on
05 Jun 2016 - 18:01
#probability
#probability-distributions
#expectation
#variance
485
Views
Understanding a Substep of the Proof for the Law of Total Variance
Published on
10 Jun 2016 - 20:08
#probability
#statistics
#variance
84
Views
Show that $E(\mathrm{var}(Y|X)) \leq (1 - \mathrm{corr}(X,Y)^2) \mathrm{var}(Y)$
Published on
31 Mar 2026 - 3:28
#probability-theory
#conditional-expectation
#correlation
#variance
162
Views
Joint density function negative variance for X and Y
Published on
12 Jun 2016 - 3:46
#probability
#probability-distributions
#variance
74
Views
Relevancy of standard deviation
Published on
31 Mar 2026 - 11:51
#probability
#definition
#standard-deviation
#variance
64
Views
Converting standard deviation of a score to standard deviation of a percent?
Published on
14 Jun 2016 - 14:41
#statistics
#variance
4.1k
Views
Negative Variance
Published on
17 Jun 2016 - 1:02
#probability
#random-variables
#variance
80
Views
variance uniqueness
Published on
29 Mar 2026 - 0:16
#variance
363
Views
Since the variance matrix is the expected value of a dyadic tensor, why is it not singular? Which is the probabilistic property behind that?
Published on
29 Mar 2026 - 15:35
#random-variables
#covariance
#exterior-algebra
#variance
#tensor-rank
1.3k
Views
Deriving Beta From Covariance
Published on
22 Jun 2016 - 17:21
#covariance
#variance
27
Views
Basic question about how to calculate a variance
Published on
24 Jun 2016 - 11:42
#statistics
#variance
339
Views
Which has higher variance, coin toss vs dice roll?
Published on
26 Jun 2016 - 14:38
#probability
#variance
79
Views
Why doesn't the Variance of a Random Variable use $\frac{1}{n}$ instead of $P(X=x_i)$? Aren't the weights already expressed in the Mean?
Published on
03 Jul 2016 - 19:57
#probability
#random-variables
#variance
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