Biology 2244A/B Lecture Notes - Lecture 4: Conditional Probability, Frequentist Probability, Frequency (Statistics)
1 Jan 2017
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Document Summary
A measure of the long-run relative frequency of an event occurring, in identical repeated traits: repeated identical tries, probability is how frequently it occurs when you do something over and over again. Classical approach: make an assumption about the theoretical probabilities: assume all possibilities are equally likely to occur. When you actually do it and get values. Do it over and over and over and over again: probability is the relative frequency. Probability of a random outcome: proportion of times the outcome would occur in a long series of repetitions. Never gets you the exact value, it could be different depending on how many trials you do. When you do something 100 times, its unlikely that you will get the proper relative frequencies. The relative frequency probability of an event tends to approach the actual probability as a procedure is repeated.
