SOC SCI 10A Chapter Notes - Chapter 11: Point Estimation, Statistical Inference, Interval Estimation
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Assume that we compute the statistic p for a sample of size n from a populations with proportion equal to p. The sampling distribution of p can be describes as: Its mean i called the expected value of p. Its standard deviation is called the standard error of pits shape is binomial (the same as the shape of b(n,p) ) 11. 2 the normal approximation to the sampling distribution of p: when n is 30 or more, the sampling distribution of p, the sample proportion, is approximately normal. 11. 3 con dence interval estimates for p, the population proportion. Inferential statistics is the branch of statistics which describes techniques for drawing conclusions about an entire population based on data obtained from a random sample. The two common types of inferences about populations are. Point estimates of population parameters: con dence interval estimates of population parameters.
