Samples 0.0 / 5 ? PsychologyMethods and StatisticsUniversityNone Created by: The ShrewCreated on: 17-01-16 13:22 Population Entire group of interest 1 of 12 Sample Subgroup of population 2 of 12 3 types of rat Winstar rat- genetically developed as model organism/ Sprague Dawley rat- calm and easy to handle/ Zucker rat- characteristically obese 3 of 12 Sampling frame Group from which sample is chosen/ sample= random selection from sampling frame 4 of 12 Observational studies Only generalised to population of interest, time and place of observation 5 of 12 Biases 3 Selection bias, Response bias, Volunteer bias 6 of 12 Rosenthal and Rosnow Volunteers- more highly educated/ need for approval/ social/ less authoritarian/ more arousal seeking/ females more than males 7 of 12 Reduced by making volunteering Interesting, non-threatening, stress importance, avoid stress, request made by person of high status- preferably female 8 of 12 Probability sampling Random- simple random, systematic/ Stratified sampling/ Cluster sampling 9 of 12 Non- probability sampling Opportunity/ purposive/ quota 10 of 12 Larger sample more normal distribution, more powerful statistical test/ too many- small differences between significant 11 of 12 Exclusion criteria variables have large effect on DV 12 of 12
Comments
No comments have yet been made