RV's and distributions
A variable for a probability distribution with countable values
What is a discrete random variable
The formula for the expected value of a discrete random variable.
What is Sum(x*f(x))
The statistical measures of how far away data lies from the average
What is variance and standard deviation
A valid function if the infinite integral is equal to 1 and is nonnegative for all x
What is a probability density function
The formula for the expected value for a continuous random variable.
The limits of the expected value
What is the integral (x*f(x))dx
What is -infinity to infinity
The general formula for variance regardless of random variable type
What is (x-mu)2*f(x)
A function that employs two random variables
A joint probability distribution/function
The formulae for a joint probability functions.
What are Sum_xSum_y(f(x,y)g(x-y)) and
integral integral f(x,y) g(x,y) dx dy
The alternate formula for variance which is independent of random variable type
What is E(X2)-(E(X))2
f(x)=3x^-4 for 1<x
0 everywhere
verify and find F
Is valid and F=1-1/x^3
Example 4.6 of Walpole
What is 3/14
The concept and formula of variance when it comes to two random variables
What is covariance and E(XY)-E(X)E(Y)