Watch and track your favorite playlist.
Curated by: Khan Academy India - English (13 videos)
This video demonstrates how to find missing observations in a dataset when the mean and variance are known, along with some of the existing observations. We'll tackle a problem by setting up two equations using the formulas for mean and variance, involving the unknown entries. We then solve this system of equations to determine the values of the missing data points. 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 Problem: Two missing observations, mean and variance are known 00:17 Setting up two equations: one from the mean, one from the variance 04:07 Solving the system of equations for the two missing values 05:57 Identifying the missing observations 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