PO218 Lecture Notes - Lecture 6: Confidence Interval, Standard Score, Statistic
Document Summary
6: estimation procedures: the logic of estimation and key terms, how to construct and interpret interval estimates for, sample means, sample proportions, sample size, width of confidence intervals. Two estimation procedures: a point estimate is a sample statistic used to estimate a population value, example: a newspaper story reports that 15% of a sample of randomly selected. Canadians did not have a regular medical doctor: confidence intervals consist of a range of values, example: between 12% and 18% of canadians did not have a regular medical doctor. Bias and efficiency: criteria for choosing estimators, bias: an estimator is unbiased if the mean of its sampling distribution is equal to the population value of interests. February 9, 2016: efficiency: extent to which the sampling distribution is clustered around its mean. Larger samples have greater clustering around mean and thus more efficiency.
