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Curated by: Khan Academy India - English (13 videos)
In this video, we demonstrate how to apply the alternative formula for calculating standard deviation. We'll work through an example with discrete data, constructing a table to find N (total frequency), the sum of (f times x), and the sum of (f times x squared). Then, we'll plug these values into the alternative formula to efficiently find the standard deviation. 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:introduction/e/calculating-the-mean) Timestamps: 00:00 Introduction to applying the alternative SD formula 00:25 Problem: Calculating SD using the alternative formula for discrete data 02:19 Calculating necessary sums: N, sum of (f_i times x_i), sum of (f_i times x_i squared) 03:56 Applying the formula and calculating the Standard Deviation 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