[PLG 310] - Final Exam Guide - Everything you need to know! (49 pages long)
Document Summary
Week 9 lecture: introduction to statistical hypothesis test. Use sample statistic to estimate a population parameter. Use sample statistic to test a hypothesis. Interval is a better way to estimate a population parameter, because the probability of estimating the exact population parameter is very low. Confidence interval is point estimate +/- maximum error. We all make decisions every day of our lives. Based on whatever evidence is available, and out beliefs and preferences; We arrive at a decision and take the appropriate action. The statistical hypothesis test follows the same process, except that it involves statistical information. Example: we take a mean of test results from group 1, and do the same process for group 3. If one mean is higher than the other, we conclude by saying one group performed better than the other on the test: this is a hypothesis on a broad level.