# SOC222H5 Chapter Notes - Chapter 4: Percentile, Quartile, Unimodality

## Document Summary

Chapter 4: measures of central tendency: categories of scores that describe what is average or typical of the distribution. In this chapter, we will learn about three measures of central tendency: the mode, the median, and the mean: the choice of an appropriate measure of central tendency for representing the distribution depends on three factors, 1. The way the variables are measured (level of measurement: 2. The mode: the mode is the category or score with the largest frequency or percentage in the distribution. That is, the mode in the previous example is spanish, not its frequency of 35,468,501: the mode is used to describe nominal variables, and some distributions, there are two scores or categories with the highest frequency. Such distributions have two modes and are said to be bimodal: when two scores or categories with the highest frequencies are quite close but not identical in frequency, the distribution is still essentially bimodal.