STAT-UB 103 Study Guide - Null Hypothesis, Confidence Interval, Statistic
30 Nov 2013
School
Department
Course
Professor
Document Summary
Standard error of the mean: standard deviation of the sampling distribution, e. g. or. : level of significance: defines unlikely values of sample statistic if null hypothesis is true. Rejection regions: reject null hypothesis if observed test statistic is in these regions. Two tail test, where each tail has area. Upper tail test (right tail), where tail has area. Lower tail test (left tail), where tail has area. Assumptions: randomly selected, sample frequency distribution is normal, i. e. given in the problem. Can find sample size by substituting in standard error in and rearranging the formula: difference of population variable of interest for two samples, used in . E. g. for mean: difference of ordered pairs, is mean of all differences in two dependent samples, is standard deviation of all differences in two dependent samples. Hypothesis testing steps: specify the population variable of interest (e. g. ii. Formulate and by assigning population values of interest (e. g. )
