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math 1530
4-2: basic concepts of Probability
Question | Answer |
---|---|
Descriptive Statistics | used to summarize or describe characteristics of data with tools such as frequency distributions, graphs, and measures of center and variation |
Inferential Statistics | used to make inferences or generalizations about a population |
Probability | chances/odds of something happening |
Event | any collection of results or outcomes of a procedure |
Simple Event | an outcome or an event that cannot be further broken down into simpler components |
Sample Space | consists of all possible simple events; that is, the sample space consists of all outcomes that cannot be broken down any further. |
Law of large numbers | as a procedure is repeated again and again, the relative frequency of an even tends to approach the actual probability |
Probability limits | -probability of an impossible event is 0 -Probability of an event that is certain to occur is 1 |
Complementary Events | The complement of event A, consists of all outcomes in which the event A does not occur |
Rounding off Probabilities | When expressing the value of a probability, either give the exact fraction or decimal or round off final decimal results to three significant digits |