chapter 2

Question 1

a function that associates a real number with each element in the sample space

Answer 1

Random Variable

Question 2

The ______________________ of a random variable X gives the probability for each value of X.

Answer 2

probability distribution

Question 3

A random variable which takes on a finite or countable infinite number of values is called a _______________________

Answer 3

discrete random variable

Question 4

one which takes on a non-countable infinite number of value is called a ____________________________

Answer 4

non-discrete or continuous random variable

Question 5

Let X be a discrete random variable the f(x) is a ___________________, __________________, ________________ of X if for each possible outcome x

Answer 5

probability function, probability mass function, or probability distribution

Question 6

A graph of f(x) is called a ___________________.

Answer 6

probability histogram

Question 7

Let X be a random variable with probability distribution f(X)

Answer 7

Mean of a random variable

Question 8

Let X be a random variable with probability distribution f(x) and mean μ

Answer 8

Variance of a random variable