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Statistics
4.1 Review Sheet
Name: ________________________
Decide if the random variable below is discrete or continuous.
1. The number of people in a gym class.
2. The weight of people in a gym class.
3. The number of miles driven on your car.
4. The number of people that can fit (safely) in your car.
5. The weight of a can of Pepsi.
6. The cost of a can of Pepsi.
7. The amount of soda in a Pepsi can.
8. The number of cans of Pepsi Ms. O’Rourke drinks in a year.
Decide if the given distribution is a probability distribution. If not, explain why.
8.
10.
9)
11. Find the missing probability in the probability distribution below.
12) Find the mean, variance, and standard deviation of the probability distribution below.
13. Find the mean, variance, and standard deviation of the probability distribution below.
14. A raffle is selling 1000 tickets for $3 each. The prizes are $750, $500, and 3 people will win
$100. Find the expected gain if you purchase one ticket.