STATS 250 Lecture Notes - Lecture 10: Dependent And Independent Variables, Standard Deviation, Asteroid Family
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STATS 250 Full Course Notes
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One random sample is taken and a variable is recorded for each individual, but then units are categorized as belonging to one population or another, e. g. male/female. Participants are randomly assigned to one of two treatment conditions, such as diet or exercise, and the same response variable, such as weight loss, is recorded for each individual unit. First, we want to estimate the value of the difference. Second, often we want to test the hypothesis that the difference is 0, which would indicate that the two proportions are equal. In either case, we will need to know about the sampling distribution for the difference in two sample proportions (from independent samples). Time magazine reported the results of a poll of adult americans. Imagine repeating the study many times, each time taking two independent random samples of sizes n1 and n2, and computing the value of.
