PS296 Lecture Notes - Lecture 2: Level Of Measurement, Frequency Distribution, Central Tendency
Document Summary
Mode (mo): most frequently occurring score or scores in a set of data; the most common value. The highest point in a frequency distribution: may not be unique; there may be more than one mode in a distribution (multimodal) Median (mdn): score in the middle of the ranked distribution the score above and below which fall the same number of scores the 50th percentile. 3, 4, 4, 5, 5, 7, 8, 8, 8, 9, 10, 11, 16: n = 13, median location = (n+1)/2. So the median is in the 7th location, which corresponds to the value 8: note that the median is not 7! 23, 54, 67, 12, 19, 98 ranked: 12, 19, 23, 54, 67, 98: n = 6, median location = (n+1)/2. So the median is in the 3. 5th location: we take the average of the values in the 3rd and 4th locations, which corresponds to the values of 23 and 54.
