Review: Data and Probability _______ vs. _______

1) What is the Interquartile range shown on the box and whisker plot below? 7 82

Look at the data representing heights of students in inches and answer the question. If a new student came into the class who was 48 in. tall, what would happen to the mean of this data set? a) The mean would decrease b) The mean would stay the same c) The mean would increase d) There isn’t enough information to tell 1)

2. Two regular six-sided dice are rolled. Which is the probability that the sum is at most four?

2. What is the purpose of a scatterplot?

3. The probability that I will take the bus is 0.2, what is the probability I will not?

3. In a group of 50 teachers 6 are mathematicians. What is the probability that a teacher picked at random will be a mathematician?

4. A fair coin will be flipped 3 times. What is the probability that the coin will land on tails exactly once?

4. The probability of a random visitor seeing a clown at the carnival and riding the Tiltawhirl is 25%. The probability of seeing a clown is 3/4. What is the probability of a random visitor riding the Tiltawhirl at the carnival?

5. Heather flipped a coin five times, and each time it came up heads. Heather flips the coin one more time. What is the theoretical probability that it will come up tails?

5. The probability of Anya going to the coffee shop is 3/10. The probability of Marty going to the coffee shop is 1/5. What is the probability that Anya or Marty will be at the coffee shop?

6. The probability of dying by a heart attack and getting hit by a car at some point in your life is.16% ( ). The probability of dying of a heart attack is 1/6. What is the probability of getting hit by a car?

6. Find the probability of rolling a number less than 4 when rolling 6-sided dice. 1/3

7

7. When flipping 3 coins, what is the probability of getting 3 tails? a)1/8 b)1/3 c)3/8 d)1/2

8. Mr. Gulati is holding five cards numbered 1 through 5. He has asked five students to each randomly pick a card to see who goes first in a game. Whoever picks the card numbered 5 goes first. Juanita picks first, gets the card numbered 4, and keeps the card. What is the probability that Yoko will get the card numbered 5 if she picks second?

8. Twenty-six squares of paper lettered A to Z are placed in a can. One letter is randomly chosen from the can and turns out to be the letter G. A second letter is drawn without putting the letter G back into the can. Which is the probability that it will be the letter F?

9. A jewelry box contains two gold hoop earrings and two silver hoop earrings. You randomly choose two earrings, one at a time. What is the probability that both are silver earrings?

9. Nicole’s pencil case there are 4 blue, 1 red, 3 black and 2 green pens. She takes out a pen without looking at it. What is the probability that it is red?

10.

There are ten people in a room. If everyone shakes everyone else’s hand exactly once, how many different handshakes are possible?

11. In how many ways can 3 different vases be arranged on a tray?

11. Fill in the blank Assigning students seats on the first day of school is an example of a ________. Permutations

12. Name one difference between a histogram and a bar graph.

12. True or false (and why) Tomorrow it will either rain or not rain. Therefor, we can know for certain that the probability of rain is.5.

13. True or False (and why) If you roll a die four times, you are more likely to get a 2,1,3,4 than a 6,6,6,6.

13. A game at the state fair has a circular target with a radius of 10.7 cm on a square board measuring 30 cm on a side. Players win prizes if they throw a dart and hit the circular area only. What is the probability of a player winning?.39, or about a 49% chance

14. Use the answer from the previous question. If 25 players were to try the game, how many of them would you expect to win? 10

14. True or False (and why) If an event is impossible, it will be written as a negative number.

15. True or false (and why) If an outcome is certain, then it will be expressed as 1.

15. A tightrope approximately 320 m long is suspended between two poles. During a performance, a break occurs in the line (the tightrope walker escapes without injury!). Assume that the line has an equal chance of breaking anywhere along its length. Determine the probability that the break occurred in the first 50 m of the tight rope.

16. What is the probability of the tight rope (320 m) breaking within 20 m of a pole?

16. You are cutting a foot-long sandwich into sections. You close your eyes and make your first cut at random. Assuming you didn’t just cut your finger off, What is the probability that your first cut will be within one inch of the first three-inch mark? 3

17 What is the probability of landing in section II in the figure below?

17. How many ways can you arrange the letters in the word “HAPPY” to make a new permutation?

18. There are nine students in a classroom. How many possible sating arrangements are there?

18. Which type of graph is best for comparing/contrasting?

19 You have a bag of marbles which you are drawing from. There are 6 green, and 4 red. You select a marble, then put it back. What is the probability that you get the same color both times?

19 You are taking bricks from a pile and stacking them. 8 are rough, 15 are smooth, and 2 have holes drilled into them. What is the probability of first selecting a rough brick, stacking it, and then selecting a brick with a hole in it.