SOC 282 Study Guide - Midterm Guide: Null Hypothesis, Type I And Type Ii Errors, Alternative Hypothesis
Document Summary
Chapter 9: testing hypotheses: overview, intro videos, five fundamental steps in hypothesis testing, null hypothesis, alternative hypothesis, one and two-tailed tests, type i and ii errors, testing the difference between two means, t tests. 3. 10. 14: one and two-tailed tests, 95% confidence interval. One tailed = z-score of 1. 645: example: women"s earnings are lower than men"s earnings. Two-tailed = z-score of 1. 96: example: there is a difference between the statistics grades of business majors and economics majors, z-score = sample mean minus population mean divided by standard error. You cannot use a z score if you don"t know the o population standard deviation. You can use a t score when you don"t know the o population standard deviation. The variable is interval-ratio level of measurement. If n is sufficiently large, you can use z instead of t (this usually means. N>30, the book mentions n>50: state the research and null hypothesis and select alpha.
