Psychology 1000 Lecture Notes - Lecture 6: Normal Mode, Frequency Distribution, Central Tendency

• School: Western University
• Department: Psychology
• Course: Psychology 1000
• Professor: Dr.Mike

Document Summary

What does variance mean? (discussion open until 26th) Aggression scale to movie-goers before or after violent or nonviolent movie. People coming out of violent movie scored higher on aggression scale when leaving the lm. Correlational study because people may have walked in with past typical violent behaviour examples of statistics: Canadian family has 2. 3 children now 1. 9 car x gets average of 39km/l. Collection of numbers (ex. grades of 8 different students) is called a distribution. Mean= average m or (x) w/ bar on top. Add up numbers & divide by n (the number of students) Median = mid point of a ranked distribution (mdn) 3 measures of central tendency tell a lot about: Shape ( normal distribution is an n shape) Overall shape determined by dispersion of scores . Range : difference between highest and lowest score ex. 98 (highest score) - 24 (lowest score) = 74.