PSYC 1010 Lecture Notes - Lecture 6: Statistical Inference, Inductive Reasoning, Standard Deviation

• School: University of Guelph
• Department: Psychology
• Course: PSYC 1010
• Professor: Lana Trick

Document Summary

Individual variaions between measurements in the group of people that you are measuring diferences. Allows you to know if you can trust your measure of central tendency of not (i. e. you have the scores 4, 4, 4, 4 n=4 and mean=4 vs. you have the scores 4, 8 , 6, 1, In example 2, there is more variability therefore the mean is less trustworthy. Inferenial staisics is based on inducive logic: measures of variability, range i. e. group 1 scores (4, 4, 4, 4) range is 4-4=0. Group 2 scores is (8, 6, 3, 1) range is 8-1= 7. Range is highest score- lowest score: standard deviaion (sd) Can also be expressed as s" standard deviaion. Expressed as " for a populaion standard deviaion. The distance the value is away from the mean. The sum of (x-mean=0) i. e. # of failed relaionships in men who are 96 years old. Sd= the square root of ( x-m)