PSYC2010 Lecture Notes - Lecture 2: Unimodality, Sampling Distribution, Null Hypothesis
Document Summary
L2 sampling distributions, hypothesis testing, single sample tests. Standard error of the mean sd of sample means, represents the typical or average distance between a sample mean (x-bar) and the mean of a population, used to define and accurately measure sampling error. Calculate sem (standard error of the mean) sd of population/sq root n (number of people in each sample) What is the probability that the sample mean will differ from the population mean by 10 points or more. Add answer together (to cover both tails) Conceptual hypotheses outlines the predicted relationship between iv and dv, e. g. heavy social drinking will be associated with low gpa. Statistical hypotheses represents the mathematical relationship presumed to exist between 2 or more population parameters, e. g. mean gpa will be lower for those who spend most nights at the red. Room (heavy social drinkers) than the mean gpa for all uq students.
