ECO220Y1 Lecture 13: Lecture 13

• School: UTSG
• Department: Economics
• Course: ECO220Y1
• Professor: Yu

Document Summary

Lecture 13 testing hypotheses about proportions i. Introduction: this second part of the course builds on concepts that were taught in the rst half. Di erent types of data encountered in statistics; Probability distributions for continuous and discrete random variables; Etc: main orientation of the second half: statistical inference. Therefore, we do not know the true value of the parameter of interest (e. g. mean, coe cient of correlation, proportions, slope in linear regression, etc. We get an estimate of the parameter of interest, computed using a sample of observations (e. g. sample mean, sample coe cient of correlation, sample proportion, estimated slope of linear regression). Sampling distribution: di erent samples would generate di erent estimates of the same parameter of interest. We want to use the estimate to infer the true value of the parameter of interest in the population, taking into account the uncertainty associated with the sampling distribution: lectures 11 and 12: con dence intervals about proportions.