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Curated by: Khan Academy India - English (13 videos)
In this video, we learn how to calculate the mean, variance, and standard deviation for continuous grouped data. We'll go through a detailed example, starting from finding mid-points, calculating the mean, then the deviations from the mean, their squares, and the sum of their products with frequencies to find the variance. Finally, we'll take the square root of the variance to get the standard deviation. The complete step-by-step method is also explained. Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now! (https://www.khanacademy.org/math/ncert-class-11/xea4762213f311c5e:statistics-ncert-new/xea4762213f311c5e:variance-and-standard-deviation/e/standard_deviation_of_a_population) Timestamps: 00:00 Introduction to Standard Deviation (SD) and Variance (continuous data) 00:29 Calculating the Mean for grouped continuous data 02:56 Calculating Variance using deviations from the mean 05:10 Calculating Standard Deviation from Variance 05:32 Summary of calculation steps for Mean, Variance, and SD Khan Academy India is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We have videos and exercises that have been translated into multiple Indian languages, and 15 million people around the globe learn on Khan Academy every month. Support Us: https://india.khanacademy.org/donate Created by Ashish Gupta