PSYC2203 Chapter Notes - Chapter 2: Multimodal Distribution, Central Tendency
Document Summary
Chapter 2: measures of central tendency- mean, median & mode: data collection, scores are collected on one or more variables and must be arranged from lowest to highest. This is known as a distribution of scores: researchers are interested in measures of central tendency (mean, median, & mode) The mean: definition: the arithmetic average of a distribution of scores, most commonly used statistic in all social science research. Provides a single, simple number that gives a rough summary of the distribution: how to calculate the mean, add all the scores in a distribution and divide by the number of scores. Or: multiply each value by the frequency for which the value occurred, add all of the products, and divide by the number of scores. The median: definition: the score in a distribution that marks the 50th percentile. Summary: measures of central tendency, in particular the mean and the median, are the most commonly used and useful statistics for researchers.
