Psychology 1000 Chapter Notes -Factor Analysis, Statistical Inference, Null Hypothesis

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

Document Summary

Summarize and describe the characteristics of a set of scores. Frequency distribution: how many participants received each score. Distribution in terms of a single statistic that represents the sample as a whole. Median midpoint of a ranked distribution unaffected by outliers. Range: difference between highest and lowest scores. Deviation score (x): measures the distance between each score (x) and the mean (m) Variance: degree of fluctuation of scores around mean (total x2/ # of x values: z score distance from the mean in standard deviation units. Normally distributed with a mean of 0 and standard deviation of 1: total variance = accounted (independent variables) + not accounted (random, uncontrolled) Standard deviation (s/sd): square root of the variance: low narrow & peak, high flat and more spread out. *the best standard deviation is to have in between high and low. Symmetrical bell-shaped curve that represents a theoretical distribution of scores in the population.