Vocabulary for Probability
Vocabulary for Probability
1. Combination: An arrangement of items or events in which order does not matter. (p. 564)
2. (Simple) Event: An outcome or set of outcomes of an experiment or situation. (p. 522)
3. Experiment: In probability, any activity based on chance (such as tossing a coin). (p. 522)
4. Experimental probability: The ratio of the number of times an event occurs to the total number of trials, or times that the activity is performed. (p. 527)
5. Factorial: The product of all whole numbers except zero that are less than or equal to a number. (p. 563)
6. Outcomes: A possible result of a probability experiment. (p. 522)
7. Permutation: An arrangement of items or events in which order is important. (p. 563)
8. Probability: A number from 0 to 1 (or 0% to 100%) that describes how likely an event is to occur. (p. 522)
9. Theoretical Probability: The ratio of the number of equally likely outcomes in an event to the total number of possible outcomes. (p.540)
10. Tree Diagram: A branching diagram that shows all possible combinations or outcomes of an event. (p. 522)
11. Independent Events: Events for which the outcome of one event does not affect the probability of the other. (p. 545)
12. Dependent Events: Events for which the outcome of one event affects the probability of the other. (p. 545)
13. Random sample: A sample in which each individual or object in the entire population has an equal chance of being selected. (p. 462)
14. Sample space: All possible outcomes of an experiment. (p. 522)
15. Biased sample/Unfair: A sample that does not fairly represent the population. (p. 463)
Examples:
1. Combination: For objects A, B, C, and D, there are 6 different combinations of 2 objects: AB, AC, AD, BC, BD, CD.
2. (Simple) Event: When rolling a number cube, the event “an odd number” consists of the outcomes 1, 3, and 5.
3. Experiment: Tossing a coin 10 times and noting the number of “heads”.
4. Experimental probability: Kendra attempted 27 free throws and made 16 of them. Her experimental probability of making a free throw is
Number made = 16 = 0.59
Number attempted 27
5. Factorial: 4 factorial = 4! = 4*3*2*1 = 24
6. Outcomes: When rolling a number cube, the possible outcomes are 1, 2, 3, 4, 5, and 6.
7. Permutation: For objects A, B, and C, there are 6 different permutations: ABC, ACB, BAC, BCA, CAB, CBA.
8. Probability: A bag contains 3 red marbles and 4 blue marbles. The probability of randomly choosing a red marble is3/7.
9. Theoretical Probability: When rolling a number cube, the theoretical probability of rolling a 4 is 1/6.
10. Tree Diagram:
11. Independent Events: A bag contains 3 red marbles and 2 blue marbles. Drawing a red marble, replacing it, and then drawing a blue marble is an example of independent events.
12. Dependent Events: A bag contains 3 red marbles and 2 blue marbles. Drawing a red marble and then drawing a blue marble without replacing the first marble is an example of dependent events.
13. Random sample:
14. Sample space: When rolling a number cube, the sample space is 1, 2, 3, 4, 5, 6.
15. Biased sample/Unfair:
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