Statistical Sciences 2244A/B Chapter Notes - Chapter 9: Statistical Parameter, Sample Space
23 Sep 2016
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9. 1 idea of probability randomized comparative experiment: an experiment that uses both comparison of two or more treatments and chance assignment of subjects to treatments. We trust randomized comparative experiment and random sampling because of chance behaviour. Chance behaviour is unpredictable in the short run but has a regular and predictable pattern in the long run. Probability: the proportion of times the outcome of a random phenomenon would occur in a very long series of repetitions. Probability:(second definition) a number between 0-1 that describes the likelihood of a random event occurring. 1 means very likely and 0 means very unlikely. the sum of probabilities for all possible outcomes must add up to 1. Probability applets allow us to try different stimulations and get faster results than doing an actual experiment. applets also allow us to see the difference between short term and long term results.
