PSYC 210 Study Guide - Midterm Guide: Categorical Variable, Univariate, Central Tendency

• School: Simon Fraser University
• Department: Psychology
• Course: PSYC 210
• Professor: Snjezana Huerta

Document Summary

Descriptive statistics: defined: help describe/understand features of a data set by using graphs/tables/discussion (are measures of central tendency and variability, measures of central tendency. Describes the center position of a distribution by lookinga t the most common patterns, (cid:449)hi(cid:272)h in(cid:448)ol(cid:448)es the (cid:272)al(cid:272)ulation of . Measures of dispersion (r/sd/iqr: range: difference between the lowest and highest values, standard deviation: the extent of deviation from the mean of a group. Inter quartile range: measure of variability, shows us where the middle 50% of a data set lies within a range (mid spread/h-spread) Leptokurtotic (very high peaked/thin shape, many scores in tails) Mesokurtotic (moderately peaked, similar to bell curve) Platykurtotic (low peak, many scores in the curve and not a lot in the tails: skew. Polytomous variables: 2+ response options: data. Discrete: scale using whole numbers (1, 2, 3) Continuous: scale that includes fractions/decimals (1, 1. 1, 1. 2)