Does $X$ (a random variable) usually refer to the population or the sample?
8980
What is meant by a "random variable"?
40953
RMSE vs Standard deviation in population
148000
Sampling with replacement or without replacement
95498
i.i.d. random variables uniform distribution
116291
Is my random variable discrete or continuous?
40501
Why are these two random variables identically distributed?
26260
What is the meaning of the density of a distribution at a point?
158635
How to understand moments for a random variable?
58810
I've heard that ratios or inverses of random variables often are problematic, in not having expectations. Why is that?
18671
Subsample of a random sample: random sample?
128746
Probability of mean of random sample being in a certain range
29150
Interpretation of the regression coefficient of a proportion type independent variable
48618
Why is there a difference between a population variance and a sample variance
156092
Existence of independent and identically distributed random variables.
128781
What does "probability distribution" mean?
49877
Expected value and indicator random variable
46380
Variance (different definitions)