Psychology 2080A/B Chapter Notes - Chapter 2: Kelvin, Chocolate Cake, Apple Pie

• School: Western University
• Department: Psychology
• Course: Psychology 2080A/B
• Professor: Patrick Brown

Document Summary

Chapter 2 - norms and basic statistics for testing. Descriptive statistics: methods used to provide a concise description of a collection of quantitative information - reports matter of fact. Inferential statistics: methods used to make inferences from observations of a small group. inferences based on something you"ve found. Mean: the arithmetic average score in a distribution. Add up all the scores and divide the sum by the number of cases. Median: the second quartile, or the 50th percentile. Mode: most frequently appearing value in a data set. Standard deviation: approximation of the average deviation around the mean (the square root of variance) Variance: obtain the average squared deviation around the mean. Nominal scale: their purpose is to name objects. Used when the information is qualitative rather than quantitative. Ordinal scale: scale with the property of magnitude but not with equal intervals or an absolute zero.