PSYC 2001 Lecture Notes - Lecture 8: Unimodality, Psychometrics, Analysis Of Variance

• School: Carleton University
• Department: Psychology
• Course: PSYC 2001
• Professor: Deanna Whelan

Document Summary

When talking about your own stats we use regular letters, when generalizing to a population we use greek letters. Mean would be x for data, or mu for population. Median: the score that divides the ranked group in half. Has (cid:862)i(cid:863) so in half or in the middle. Divided by the number of values summed up. X bar, m, xdot, gm, oh the (cid:272)o(cid:374)fusio(cid:374)! Need to sort from lowest to highest values, then locate the middle position (odd and even are a bit different) What is the median of? (odd number) Position of median = n+1/2 = 7+1/2= 8/2= 4. 1, 2, 4, 5, 9, 11, 13. What is the median of the following distribution. 4, 3, 1, 1, 6, 2, 2, 4. Step 1: sort distribution from lowest to highest. Step 2: locate the position of the median. Position of median= n+1/2= 8+1/2= 9/2= 4. 5. 1, 1, 2, 2, 3, 4, 4, 6.