PSYB01H3 Chapter Notes - Chapter 10: Statistical Parameter, Central Tendency, Confidence Interval
Document Summary
Descriptive statistics: used to describe the variables in a study, both one at a time and in terms of their relations to each other. Ie age, gender, socioeconomic status, and other such variables. Inferential statistics: used to estimate characteristics of a population from those we found in a random sample of that population. This can be used to test hypotheses about the relationship between variables. Is a probability of frequency distribution of only one variable. Freqency distributions: shows the number of cases and/or the percentage of cases who receive each possible score on a variable. Require grouping after data is collected when there are more than 15 to 20 values to begin with and if the distribution of the variable will be clearer or more meaningful if some of the values are combined. Categories should be logically defensible; should be mutually exclusive and exhaustive so that every case should be classifiable in one and only one category.
