PSY 2106 Chapter Notes - Chapter 3: Central Tendency, Line Graph
Document Summary
Central tendency: a statistical measure to determine a single score that defines the center of a distribution. The goal of central tendency is to find the single score that is most typical or most representative of the entire group. Mean: the sum of the scores divided by the number of scores. Weighted mean: the mean obtained when two samples are combined. Steps: determine the sum of all the scores in both samples. This sum is obtained by adding the sum of the scores for the first sample ( ) and the sum of the scores for the second sample: determine the combined number of scores in both samples. This value is obtained by adding the number in the first sample (n) and the number in the second sample (n): divide the sum of all the scores (step 1) by the total number of scores (step 2). Weighted mean = combined combined n.
