BUSS1020 Lecture Notes - Lecture 10: Point Estimation, Pooled Variance, Standard Deviation

• School: University of Sydney
• Department: Business Studies
• Course: BUSS1020
• Professor: All

Document Summary

O samples are randomly and independently drawn; sample selected from 1 pop. Assumptions: has no effect on sample selected from other pop pop means (cid:2869) (cid:2870) Week 10- hypothesis testing with 2 sample tests: Goal: tests hypothesis to form a confidence interval for the difference between 2. Goal: tests means of 2 related populations. Typically used before/after a survey to eliminate variation among subjects. Key: we take paired differences (combined into 1 figure) and conduct a hypothesis test. Assumptions: both populations normally distributed, sample large enough. The point estimate for the paired difference population mean is : Sample standard deviation sd is: where n is the number of pairs in the paired samples. Goal: test a hypothesis or form a confidence interval for the difference between 2. In questions with related samples, you must outline what is!! (e. g. (cid:2869) (cid:2870)) pop proportions (cid:2869) (cid:2870) Point estimate for the difference is p1 p2.