https://www.khanacademy.org/math/ap-statistics/summarizing-quantitative-data-ap/more-standard-deviation/v/review-and-intuition-why-we-divide-by-n-1-for-the-unbiased-sample-variance 2021-07-01T02:19:31Z Review and intuition why we divide by n-1 for the unbiased sample variance Reviewing the population mean, sample mean, population variance, sample variance and building an intuition for why we divide by n-1 for the unbiased sample variance Sal Khan video https://cdn.kastatic.org/googleusercontent/-xxiNyIgrEfhjEc0fAdHUgAfVp1b_qnwNzULHFUuaGjlvZ4V6juPkJ4PFC85aK3FxBb_tDKMIdoihAvmdjtbfco Review and intuition why we divide by n-1 for the unbiased sample variance Reviewing the population mean, sample mean, population variance, sample variance and building an intuition for why we divide by n-1 for the unbiased sample variance https://cdn.kastatic.org/ka-youtube-converted/KkaU2ur3Ymw.mp4/KkaU2ur3Ymw.mp4 584 Más sobre la desviación estándar https://www.khanacademy.org/math/ap-statistics/summarizing-quantitative-data-ap/more-standard-deviation/v/another-simulation-giving-evidence-that-n-1-gives-us-an-unbiased-estimate-of-variance 2021-07-01T02:19:29Z Why we divide by n - 1 in variance Another visualization providing evidence that dividing by n-1 truly gives an unbiased estimate of population variance. Simulation at: http://www.khanacademy.org/cs/unbiased-variance-visualization/1167453164 Sal Khan video https://cdn.kastatic.org/googleusercontent/Nz0L_jixPsMvBdxKmfn1-roDIe4gxalxNoCN1-4Q564YQB645ZdLVcwjZQbmfdsd2vHfghu-S_qXGecVdS8hIwU Why we divide by n - 1 in variance Another visualization providing evidence that dividing by n-1 truly gives an unbiased estimate of population variance. Simulation at: http://www.khanacademy.org/cs/unbiased-variance-visualization/1167453164 https://cdn.kastatic.org/ka-youtube-converted/F2mfEldxsPI.mp4/F2mfEldxsPI.mp4 286 Más sobre la desviación estándar https://www.khanacademy.org/math/ap-statistics/summarizing-quantitative-data-ap/more-standard-deviation/v/simulation-showing-bias-in-sample-variance 2021-07-01T02:19:28Z Simulation showing bias in sample variance Simulation by Peter Collingridge giving us a better understanding of why we divide by (n-1) when calculating the unbiased sample variance. Simulation available at: http://www.khanacademy.org/cs/challenge-unbiased-estimate-of-population-variance/1169428428 Sal Khan video https://cdn.kastatic.org/googleusercontent/41wKSvzPzcX2D_7_wvPHuybs8UOXD-ITcbQTVDfILBTi4KFdEC1-KTMBnACPo2uba3a2XRYPGPgx1DUlKFtosR0R Simulation showing bias in sample variance Simulation by Peter Collingridge giving us a better understanding of why we divide by (n-1) when calculating the unbiased sample variance. Simulation available at: http://www.khanacademy.org/cs/challenge-unbiased-estimate-of-population-variance/1169428428 https://cdn.kastatic.org/ka-youtube-converted/Cn0skMJ2F3c.mp4/Cn0skMJ2F3c.mp4 384 Más sobre la desviación estándar https://www.khanacademy.org/math/ap-statistics/summarizing-quantitative-data-ap/more-standard-deviation/v/simulation-providing-evidence-that-n-1-gives-us-unbiased-estimate 2021-07-01T02:19:29Z Simulation providing evidence that (n-1) gives us unbiased estimate Simulation by KA user tetef showing that dividing by (n-1) gives us an unbiased estimate of population variance. Simulation at: http://www.khanacademy.org/cs/will-it-converge-towards-1/1167579097 Sal Khan video https://cdn.kastatic.org/googleusercontent/4gHBkWyOs4_EuGhXCAwX5QwSCOnHbgHlYDXuH0UcUqNwDP0KfGwl7F27o8VlVVmKStkP7Tla7ZVDdZZfUGdfu1hp Simulation providing evidence that (n-1) gives us unbiased estimate Simulation by KA user tetef showing that dividing by (n-1) gives us an unbiased estimate of population variance. Simulation at: http://www.khanacademy.org/cs/will-it-converge-towards-1/1167579097 https://cdn.kastatic.org/ka-youtube-converted/0QS4VHPV4JA.mp4/0QS4VHPV4JA.mp4 270 Más sobre la desviación estándar https://www.khanacademy.org/math/ap-statistics/summarizing-quantitative-data-ap/more-standard-deviation/a/unbiased-estimate-of-population-variance 2021-07-01T02:19:32Z Unbiased estimate of population variance A CS program to help build intuition article