Stat 160 Prequiz over Section 4.1, 4.2, and 4.3



This work is to be submitted for credit. Attempt all problems. Make sure you have attempted all problems before you submit. You may solve the problems several times, but only the first submission will get credit. Remember, don't hit the enter key until you are ready to submit this quiz.

Please fill out the information below.

Your User Name: 
Your Password: 

1. I choose 100 WMU students at random and ask them their weight. Let the random variable X= weight. What type of random variable is X?

Continuous
Discrete
Parameter
Variable
2. Let the random variable X be the number rolled from a fair 6-sided die. What type of random variable is X?
Discrete.
Continuous.
Whacko.
Not enough information.
3. Let the random variable X be the number rolled from a fair 6-sided die. Which is the correct probability distribution of X [Pr(x=1), Pr(x=2), Pr(x=3), Pr(x=4), Pr(x=5), Pr(x=6)]?

1/6, 2/6, 3/6, 4/6, 5/6, 6/6
0, 0, 1, 0, 0, 0
1, 1, 1, 1, 1, 1
1/6, 1/6, 1/6, 1/6, 1/6, 1/6
4. The mean of a random variable is an example of a

Continuous random variable.
Discrete random variable.
Parameter.
Country in Central America.