1. A board-game club meets each week at the local library. People bring different board games to play, like checkers and chess. Out of the 50 people that meet each week, 67% prefer to play checkers over chess. Construct an 83% confidence interval for the population mean of people that prefer to play checkers over chess.
   1. CI = (57.89%, 76.14%)
   2. CI = (56.06%, 77.94%)
   3. CI = (53.97%, 80.03%)
   4. CI = (49.88%, 84.12%)
2. After rolling a fair twenty-sided die 200 times, the observed (or experimental) probability of rolling a 20 was 25%. What will happen to the probability of rolling a 20 if this die is rolled 10,000 more times?
3. The grades for the latest statistics exam are normally distributed. The mean was 93 with a standard deviation of 4. Without using a calculator, what is the probability that you will receive a grade that is between 89 and 97 on this exam?
   1. 68.24%
   2. 95.44%
   3. 99.74%
   4. 47.72%
4. Which is a discrete random variable?
   1. Y = "height of an emperor penguin on Antarctica"
   2. Z = "results of flipping two coins"
   3. W = "exact time it takes for a computer to update its software"
   4. X = "weight of the microprocessor inside your computer"
5. Given that a randomly chosen card from a standard deck of 52 cards is less than 7, what is the probability it is the 5 of diamonds? Assume that aces are low cards.
   1. 1.9%
   2. 53.8%
   3. 4.2%
   4. 27.6%
6. How can you make a 95% confidence interval smaller without changing the confidence level?
7. There are 3 ways to get from Town A to Town B, 4 ways to get from Town B to Town C, and another 5 ways to get from Town C to Town D. In how many different ways could we get from Town A to Town D?
   1. 60
   2. 220
   3. 1320
   4. 12
8. You flip a coin 12 times. It lands on tails 9 times. What is the experimental probability of landing on heads?
   1. 0.75
   2. 0.33
   3. 0.50
   4. 0.25
9. If continuous random variable X is normally distributed with = 5625 and = 875.5, what is P(5000 X 6000)?
   1. 90.53%
   2. 42.75%
   3. 9.47%
   4. 47.72%
10. When should the Empirical Rule be used?