218x Filetype PPTX File size 0.61 MB Source: faculty.cas.usf.edu
Questions • Define –Mean –Median –Mode • What is the effect of distribution shape on measures of central tendency? • When might we prefer one measure of central tendency to another? Questions (2) • Define – Range – Average Deviation – Variance – Standard Deviation • When might we prefer one measure of variability to another? • What is a z score? Variables have distributions • A variable is something that changes or has different values (e.g., anger). • A distribution is a collection of measures, usually across people. • Distributions of numbers can be summarized with numbers (called statistics or parameters). Central Tendency refers to the Middle of the Distribution Variability is about the Spread