PS102 Lecture Notes - Lecture 46: Central Tendency, Statistical Significance, Frequency Distribution
Document Summary
Scientific theories and hypotheses: theory, explains and predicts observed phenomena, hypothesis, falsifiable and testable prediction, confirmation, data, systematic observation. Special samples (e. g. , genie in linguistic isolation) Used to give basic information about what we find. Provides a summary / frequency distribution or table. Determine correlations (if there is a relationship between the variables) The mean, median, mode (measures of central tendency) The standard deviation, the range (measures of variability) Variability-gives how much variability a score has from the mean. Little variability-all bunched up close to the mean. Add all the scores, then divide by the number of scores. Employees" depression score of company a: 500, 600, 700, 1000 => mean depression score = 2800/4 = 700. Employees" depression score of company b: 500, 600, 700, 10000 => The one that falls in the middle if the distribution. Mode is the most commonly or frequently occurring score.
