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: standard deviation
Standard Error Explained: Formula, Meaning and SD vs SE
Standard error is mistakenly reported instead of standard deviation in up to 64% of published articles. Understanding the standard error formula, and exactly how it…
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…