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| A number between 0 and 1 that measures the chance of an event happening. |
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| The set of all possible outcomes in a probability experiment. |
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| A set of one or more outcomes in a probability experiment |
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| A possible result in a probability experiment. |
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| An outcome or event is certain if it has a probability of 1. |
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| An outcome is likely if it probably will happen. It would have to better than a 50% chance (between 1/2 and 1) |
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| an outcome is unlikely if it probably will not happen. It has to be less than 50% or between 1/2 and 0. |
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| is the ratio of the number of favorable outcomes to the number of possible outcomes. It tells you what should happen. |
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| is the ratio of the number of favorable outcomes to the total number of trials. It tells you what actually happened. |
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a comparison of two quantities, such as
(4:1) meaning 4 tires to 1 car. |
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| a part of a population used to get information about that population |
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| Entire group about which you want information |
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| a sample where every member is chosen by chance, and everyone in the population has an equal chance of being chosen. |
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| a sample that is not representative of the entire population |
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| the sample gives the same answers you would get if you surveyed the entire population. |
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| events for which the outcome of one affects the probability of the other |
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| events for which the outcome of one does NOT affect the probability of the other |
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| a diagram used to organize all of the possible outcomes in a sample space |
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