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Unformatted text preview: according to rules of probabilities Probability Distribution of Random Variables The probability distribution of random variable x, p(a) gives the probability that the random variable will take on each of possible values. Sampling Distribution and Confidence Interval Point Estimators Biased Sample does not represent all characteristics of population Point Estimate vs. Interval Estimate Statistic describes sample Parameter describes population Point Estimates Mean, standard deviation, mode, and median. v/x Type of Computer 0-3m 3-6m 6-12m Total Notebook 34 15 258 448 Desktop 56 346 128 530 Total 90 592 386 978 S Point estimate for quantitative variables. Comparing two populations Comparing mean and variances __ __ 1 2 X 1 X 2 Common Point Estimator 1 2----- = 1 2 1...
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This note was uploaded on 04/18/2008 for the course ECON 205 taught by Professor Diagne during the Fall '07 term at Towson.
- Fall '07