SOC202H1 Lecture : lecture note
Document Summary
Also need an index to show how scores are distributed around mean, plus or minus, Range, is first measure, difference between largest and smallest score, very crude measure of variation and is useless, have to organize smallest and largest, Variance and standard deviation, deviation and difference from mean. X is any score x bar is mean, every score and find deviation equal is 0, We square everything, and get 9. 2, devide by number of squares, Variance the unit of measurement is altered, to return u square both sides, s is standard deviation. 8. 67 is variance the other is standard deviation. Standard deviation coverst variance to units we can understand. How do we interpret it, stands for average variabilaity in distribution, its average deviation around mean, greater varibalilty greater the standard deviation. Range is most simple, logically range not greater then standard deviation. Standard deviation eflects all socres, must be interval level data.
