PSYC 217 Study Guide - Frequency Distribution, Partial Correlation, Central Tendency
Document Summary
Nominal, ordinal, interval, ratio types of statistics appropriate for study. Nominal: no numerical, quantitative properties, categories or groups. Ordinal: minimal quantitative distinctions, rank order lowest to highest. Interval: intervals between the levels are equal in size, five or more quantitative levels. Allow for more sophisticated statistical treatments than ordinal scales. Ratio: equal intervals and absolute zero points that indicates the absence of the variable. Analyzing the results of research investigations: comparing group percentages, correlating individual scores. Needed when you do not have distinct groups of subjects. Instead, individuals are measured on two variables, and each variable has a range of numerical values: comparing group means. Compare the mean responses of participants in two or more groups. Number of individuals that receive each possible score on a variable, exam score. Pie charts particularly useful when representing nominal scale information. Frequency polygons line to represent frequencies, most useful when the data represent interval or ratio scales.
