Breadcrumb Home > Dictionary > Index P probable error: Meaning and Definition of Find definitions for: prob'able er'ror Pronunciation: [key] — Statistics. Statistics. a quantity formerly used as a measure of variability: equal to 0.6745 times the standard deviation. A normally distributed population has half of its elements within one probable error of the mean. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. probable cause probably TrendingHere are the facts and trivia that people are buzzing about. Chinese New Year History, Meaning, and Celebrations Current Events This Week: February 2024 Valentine's Day Valentine's Day History Mardi Gras 30 "Charlie and the Chocolate Factory" Quotes ✖ Related Content Daily Word Quiz: recherch Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language