STAT 350 Lecture Notes - Lecture 3: Point Estimation, Confidence Interval, Null Hypothesis
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Inference on proportions (one sample proportion -- confidence intervals, determining sample size and hypothesis. Mean of sampling distribution of p hat is p; that is, p hat is an unbiased estimator. For large samples, the sampling distribution of p hat is approximately normal. a sample is considered large if n p hat is greater than or equal to fifteen and (1-p hat) is greater than or equal to 15. In words: point estimate +/- (critical value) x (standard deviation of the sampling. The formula under the square root is the standard error. Z* is standard normal value from tables. Hypothesis testing (one sample) level for the test. Direction of ha depends on the research question. State null and alternative hypotheses and the value of alpha, the significance. Use statistic to make decision regarding the null hypothesis. Interpret statistic in context of the researcher"s initial question. Consider inferential procedures concerning a comparison between the rates of.