Does a Zero Variance imply a constant random variable?
114179
If $Var(X)=0$ then is $X$ a constant?
17107
Existence of the moment generating function and variance
124392
Variance of a distribution's product with itself
133833
If $E(Y\mid X)$ is constant then $X, Y$ are uncorrelated.
11727
How can a distribution have infinite mean and variance?
62763
"Absolutely continuous random variable" vs. "Continuous random variable"?
123929
What is the correlation if the standard deviation of one variable is 0?
111742
Variance of sample variance?
86518
Does $X$ have a lower bound?
78786
Why does an open interval NOT have measure zero?
122949
memoryless property of exponential distributions with random variables
77619
Generalizing variance to two dimensions
40725
Uniform random variable as sum of two random variables
8737
A random variable with neither probability density function nor probability mass function... is this example wrong?
37371
Why is expected value of random variable equal to mean
116291
Is my random variable discrete or continuous?
62665
If X and Y are continuous random variables, then the random vector (X,Y) is a continuous random vector?