POL 3371 Study Guide - Midterm Guide: Nonprobability Sampling, Dependent And Independent Variables, Ordinal Data
5 Mar 2014
School
Department
Course
Professor
Document Summary
Age (years) is an example of an interval/ratio level variable. Interval/ratio variables have categories that can be ranked with the same specified distance between categories or values. Sampling distribution is the difference between the sample statistic and the population parameter. Cramer"s v is a measure of association appropriate for nominal variables. It is impossible to determine whether political preference, province, or hours spent online is an ordinal variable. Mean scores should only be calculated if we have interval/ratio variables. Visual inspection of frequency distributions will suffice for finding the mode. The median is a measure of central tendency that refers to the value above which and below which 50 percent of the cases fall. The number of respondents in national surveys generally should be 1,000-2,000. The term population refers to all cases to which a researcher"s conclusions are meant to apply. The chi square test can be used to determine statistical significance.
