PSY 202 Lecture Notes - Lecture 2: Cumulative Frequency Analysis, Nominal Category, Statistical Parameter
Document Summary
Populaion enire group in which we are interested; usually considered to be of ininite size, so we can"t see it all. Sample taking smaller group from populaion, test them, generalize back to overall populaion: symbols. Dependent one we measure: qualitaive v. quanitaive. Quanitaive count something: coninuous v. discrete. Discrete must be whole integers (qualitaive) Measurement scales: nominal, ordinal, interval, raio. Ordinal category membership and rank order. Interval category membership, rank order, and distance. Raio category membership, rank order, distance, and true zero (represents the absence of something) Reliability (in general) whether you are geing consistent results. Validity (in general) whether you are tesing what you think you are tesing. Simple frequency number of ime each value in distribuion shows up. Relaive frequency simple frequency divided by total number of scores (n) Cumulaive frequency number of scores in distribuion that are at or below a given value.
