PSY 200 Lecture Notes - Lecture 3: Central Tendency
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By the end of today"s lecture, you should: Learn the three measures of central tendency: mean, median, and mode. Central tendency defines the center of a distribution of data. Uses a single score to represent the entire sample. Sum of the scores, divided by the number of scores. Changing the value of a score changes the mean. Introducing a new score or removing a score changes the mean (unless the score added or removed is exactly equal to the mean) Chapter 3: measures of central tendency// 14 sept. 2018 // page 1. The midpoint of scores when listed in order from smallest to largest. Divides a distribution into two groups of equal size. In an odd-numbered distribution, the middle score is the median. In an even-numbered distribution, average the two middle scores for the median. Score/category with greatest frequency in the distribution. Can be used with any scale of measurement.
