KINE 2050 Lecture Notes - Lecture 6: Fallacy, Binomial Distribution
9 Apr 2020
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Probability: the likelihood that an event will happen. Probability in statistics: the quantitate expression of the likelihood of occurrence of an event. The ratio of frequency of the event over the total number of opportunities or possibilities. If an event never happens, the numerator value is 0. If an event always happens, the numerator and the denominator are equal. (=1) Two ways to determine probability of an event: Possible if all possible outcomes and their relative likelihood are known. Accomplished by observing frequency of occurrence relative to the total number of opportunities. What is the probability that the next person you encounter will be black haired. Same as asking what proportion of people have black hair. Observe some number of individuals and note how many have black hair. Empirically, determined probabilities must be derived from representative samples that are of adequate sized in order to be useful and validly generalized. Note: the probabilities of all possible outcomes sum to one.
