Measures of Central Tendency and Dispersion in Psychology
In 1907 Francis Galton lined up 787 guesses of an ox's weight. The middle guess, the median, was 1,207 lb. The ox weighed 1,198 lb (Galton, 1907). Cho…
Tag: descriptive statistics
Normal and Skewed Distributions in Psychology: A-Level Guide
When Theodore Micceri tested 440 large sets of psychology and education scores for a normal distribution, every single one failed the test (Micceri, 1…
Standard Deviation in Psychology: Definition & Calculation
Two psychology classes can score identical averages yet tell completely different stories — standard deviation is the single statistic that reveals whether those scores clustered…