Sociology 2205A/B Lecture Notes - Lecture 3: Central Tendency, Unimodality, Bias Of An Estimator

• School: Western University
• Department: Sociology
• Course: Sociology 2205A/B
• Professor: Ana Zajacova

Document Summary

You should know : how to calculate and interpret univariate descriptives for continuous variables, numerical: Measures of central tendency (mean, also median) and. Dispersion (standard deviation, also variance, range, iqr: graphical: histogram, shows shape of the distribution. Variance is just s. d squared: recall our example of highest daily temperature recorded in london in mid-january. 2018: calculate their average, how to avoid the zero, how might you find average distance of the scores from the mean =(cid:2780), calculate the deviances (cid:894)- (cid:895) Problem: their sum/average (cid:894)- (cid:895) =(cid:2777) (property of the mean) Square each deviation(cid:894)- (cid:895)(cid:2779: defined as s2 = (cid:894)- (cid:895)2, possi(cid:271)le (cid:396)a(cid:374)ge: 0 to , note: denominator typically n-1, not n as. Their average is variance = var or. S2 (1/n (x - (cid:454) )2: denoted by s2. This is because the formula is a. Sample standard deviation: fix? (cid:271)iased esti(cid:373)ato(cid:396) of populatio(cid:374) (cid:448)a(cid:396)ia(cid:374)(cid:272)e. you(cid:859)(cid:396)e (cid:374)ot e(cid:454)pe(cid:272)ted to full(cid:455) u(cid:374)de(cid:396)sta(cid:374)d this statement.