Name______Date______
Statistics & Probability Ms. Parent
3.1-3.3 Quiz Review
Identify the sample space of the probability experiment and list the outcomes of the event.
1. Experiment: Tossing three coins
Event: Getting two heads
2. Experiment: Guessing the gender of the three children in a family
Event: The family has two boys
Classify the statement as an example of classical probability, empirical probability, or subjective probability.
3. On the basis of prior counts, a quality control officer says there is a 0.05 probability that a randomly chosen part is defective.
4. The probability of randomly selecting five cards of the same suit (a flush) from a standard deck is 0.0005.
5. The chance that Corporation A’s stock price will fall today is 75%.
6. The probability of a person from the United States being left handed is 11%.
Identify the following as simple or not simple.
7. Rolling a 6-sided die and obtaining a 3.
8. Rolling a 6-sided die and obtaining an odd number.
The table below shows the approximate U.S. age distribution for the year 2005. Use the table to determine the probability of the event.
Age / 19 and under / 20-34 / 35-59 / 60-84 / 85 and overPopulation / 28% / 20% / 35% / 15% / 2%
9. What is the probability that a randomly selected person in the U.S. will be at least 20 years old?
10. What is the probability that a randomly selected person in the U.S. will be
less than 60 years old?
The list below shows the results of a study on the use of plus/minus grading at North Carolina State University. It shows the percents of graduate and undergraduate students who received grades with pluses and minuses (for example, C+, A-, etc.).
· Of all students who received one or more plus grades, 92% were undergraduates and 8% were graduates.
· Of all students who received one or more minus grades, 93% were undergraduates and 7% were graduates.
Make a table to answer the following.
11. Find the probability that a student is an undergraduate student, given that
the student received a plus grade.
12. Find the probability that a student is a graduate student, given that the
student received a minus grade.
Decide whether the events are independent or dependent.
13. Tossing a coin four times, getting four heads, and tossing it a fifth time and
getting a head.
14. Taking a driver’s education course and passing the driver’s license exam.
Find the probability of the sequence of events.
15. Your sock drawer has 12 folded pairs of socks, with 4 pairs of white, black,
and blue. What is the probability, without looking in the drawer, that you will first select and remove a black pair, then select either a blue or white pair?
Decide if the events are mutually exclusive.
16. Event A: Randomly select a person who uses the Internet at least twice a
week.
Event B: Randomly select a person who has not used the Internet in seven days.
17. Event A: Randomly select a person who loves cats.
Event B: Randomly select a person who owns a dog.
Determine the probability.
18. A card is randomly selected from a standard deck. Find the probability that
the card is between 4 and 8 (inclusive) or is a club.
19. A card is randomly selected from a standard deck. Find the probability that
the card is red or a queen.
20. A 12-sided die, numbered 1-12, is rolled. Find the probability that the roll
results in an odd number or a number less than 4.
21. A coin is flipped and a die is rolled. Find the probability that the result is a
Heads and a 5.
22. You have two dice in your hand, what is the probability that when you roll
the die you will get a total of more than 10.
23. Determine the probability of selecting two cards (without replacement) and
them both being hearts.
24. What is the Law of Large Numbers.