目录
Chapter3: Central tendency and Variability
Guide
- Central tendency: The situation at the middle position of a distribution, also known as concentration trend, used to estimate and predict the overall situation.
- Variability: describes the variability of data distribution, is a quantitative description of the extension of distribution and the degree of aggregation, used to measure the size of estimation and prediction errors.
Points
- Learn to calculate mean, median, and mode;
- Learn how to choose the appropriate central tendency for a given score distribution;
- Learn to calculate standard deviation, interquartile range, and full range;
- Learn how to choose the appropriate variability for a given score distribution.