PSYC 2021 Study Guide - Final Guide: Null Hypothesis, England Runestones

• School: York University
• Department: Psychology
• Course: PSYC 2021
• Professor: Edward Haltrecht

Document Summary

The t statistic is used when the population variance or standard deviation is unknown. The t statistic uses the sample variance or standard deviation in place of the unknown population values: a. The sample standard deviation describes the variability of the scores in the sample. The standard error provides a measure of the: a. The sample variance is 16 and the estimated standard error is 2. b. With n = 16, sm = 3 and t = 4. 6/3 = 1. 53. This is not greater than the critical value of. 2. 131, so there is no significant effect: with n = 36, sm = 2 and t = 4. 6/2 = 2. 30. Solutions - chapter 9 - page 312 treatment effect. 2. 306, so we reject the null hypothesis and conclude that there is a significant: with s = 15, sm = 5 and t = 7/5 = 1. 40.