PSY201H1 Study Guide - Xm Satellite Radio, Standard Deviation
Document Summary
Interval = intervals of same size (zero point is arbitrary like temperature) shows distance and direction of difference. Parameter = pop, statistic = sample descriptive stats = summarize, organize, simplify data (graphs, tables, etc. ) Inferential stats = use sample data to make general conclusions about the pop (generally not perfect reps of pop parameters) Sampling error = error b/w sample stat and pop. parameter (relationship between variables no cause and effect) Correlational = measures 2 variables (ex. sleep and academic performance); no manipulation, just observation. Experimental = i. v. manipulated and d. v. observed; tries controlling other variables that might influence (cause & effect) Non-experimental/quasi-experimental = compares pre-existing groups (ex. boys/girls), no manipulation/control (no c and e) Nominal scale = not quantitative, categories with diff names (can"t determine direction/distance of difference) mode! Ordinal = ranked by size (shows direction but not distance; can"t tell how much bigger something is)
