PSYC 2360 Chapter Notes - Chapter 12: Standard Deviation, Frequency Distribution, Central Tendency

• School: University of Guelph
• Department: Psychology
• Course: PSYC 2360
• Professor: Carol Anne Hendry

Document Summary

Correlating individual scores: do not have distinct groups of subjects, individuals measured on 2 variables (each with range of numerical values) Comparing group means (example page 225) comparing mean number of aggressive acts by children in 2 conditions (model and control) to determine whether child who observed model were more aggressive than children in control condition. Indicates number of individuals that receive each possible score on variable. Allow researchers to make precise statements about data, 2 statistics needed single number used to describe central tendency, another number describes variability. Central tendency tells us hat the sample as a whole, or on average, is like. Mean (set of scores obtained by adding all scores and dividing by number of scores only for interval or ratio scales), median (score that divides the group in half - ordinal scale) and mode (most frequent score. Only for nominal scales, does not use actual values on scale but simply indicates most frequently occurring value)