PSY201H1 Study Guide - Unimodality, Standard Deviation, Squared Deviations From The Mean
Document Summary
A characteristic of frequency distribution and its derivatives would be that it does not allow quantitative comparisons to be made between two or more distributions. The measure computed (of the average score of each variable) is a measure of the central tendency of each distribution. It is important and useful to quantify the variability of the distribution. Central tendency and variability are the most important factors, and the two characteristics of distribution which are typically quantified. Value originally calculated when you average something. The sum of the scores divided by the number of scores. Key properties of the mean include the fact that it is sensitive to the exact value of all the scores in the distribution. Any change in the scores will cause a change in the mean. The sum of the deviations about the mean equals zero. The mean is also very sensitive to extreme scores (extreme scores: score that is far from the mean score)
