PSYC 2150 Chapter Notes - Chapter 1-5: Sample Space, Marginal Distribution, Lincoln Near-Earth Asteroid Research

• School: University of Virginia
• Department: Psychology
• Course: PSYC 2150
• Professor: Willingham Dan

Document Summary

Variables can have different values for different cases: some variables are categorical and quantitative, a categorical variable places each cases into a category, such as male or female, a quantitative variable has numerical values that measure some characteristic of each case, such as height in centimeters or salary in dollars per year, exploratory data analysis uses graphs and numerical summaries to describe the variables in a data set and the relations among them, the distribution of a variable describes what values the variable takes and how often it takes these values, to describe a distribution, begin with a graph, categorical: bar graphs and pie charts, pareto charts: a bar graph in order, quantitative: histograms and stemplots, when examining any graph, look for an overall pattern and for notable deviations from the pattern, shape, center, and spread describe the overall pattern of a distribution.