https://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-data-statistics/cc-6th/v/median-and-range-puzzle 2023-11-15T22:05:30.45543254Z Median & range puzzlers In a car dealership with 11 salespeople, the median number of cars sold is six, and the range of cars sold is four. This means the difference between the highest and lowest number of cars sold is four. Therefore, it's impossible for any salesperson to have sold more than 10 cars. video https://cdn.kastatic.org/googleusercontent/iIWqj8kxH8qK0tnYNtHBhbErZcdadyCTd35vXN9ccpW2YIBBbybMMnwoRWi-BxxAtbWtVLIYMKXT4Kc58WdpZXA Median & range puzzlers In a car dealership with 11 salespeople, the median number of cars sold is six, and the range of cars sold is four. This means the difference between the highest and lowest number of cars sold is four. Therefore, it's impossible for any salesperson to have sold more than 10 cars. https://cdn.kastatic.org/ka-youtube-converted/0cHCpgQD_8k.mp4/0cHCpgQD_8k.mp4 415 Medición de la dispersión en datos cuantitativos https://www.khanacademy.org/math/statistics-probability/summarizing-quantitative-data/more-mean-median/e/median-and-range-puzzlers 2026-04-08T00:16:02.937952483Z Median & range puzzlers These conceptual problems really make you think! Getting through this exercise will deepen your understanding of median, range, and data sets in general. Ben S. exercise https://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-data-statistics/cc-6th/v/calculating-interquartile-range-iqr 2021-07-01T17:39:49Z Interquartile range (IQR) The IQR describes the middle 50% of values when ordered from lowest to highest. To find the interquartile range (IQR), ​first find the median (middle value) of the lower and upper half of the data. These values are quartile 1 (Q1) and quartile 3 (Q3). The IQR is the difference between Q3 and Q1.   video https://cdn.kastatic.org/googleusercontent/1dM5VIaSdqW2AZdzrYN2VRde7taL_-C1sVBNWw9IfSKnaQ8X-qKdR4G3AE5vC4MVwnjsfZQuQ6cTnshyZdvRon0ZlA Interquartile range (IQR) The IQR describes the middle 50% of values when ordered from lowest to highest. To find the interquartile range (IQR), ​first find the median (middle value) of the lower and upper half of the data. These values are quartile 1 (Q1) and quartile 3 (Q3). The IQR is the difference between Q3 and Q1.   https://cdn.kastatic.org/ka-youtube-converted/qLYYHWYr8xI.mp4/qLYYHWYr8xI.mp4 372 Medición de la dispersión en datos cuantitativos https://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-data-statistics/cc-6th/e/calculating-the-interquartile-range--iqr- 2026-03-31T08:52:19.062243676Z Interquartile range (IQR) Practice finding the interquartile range (IQR) of a data set. Ben S exercise https://www.khanacademy.org/math/ap-statistics/summarizing-quantitative-data-ap/measuring-spread-quantitative/v/sample-variance 2024-01-19T18:34:27.70568811Z Sample variance We delve into measuring variability in quantitative data, focusing on calculating sample variance and population variance. The importance of using a sample size minus one (n-1) for a more accurate estimate is highlighted. The distinction between sample mean and population mean is also clarified. Sal Khan video https://cdn.kastatic.org/googleusercontent/ovbflWyVJWPSU5OpM1Gy72CSUBwfhLsja194Vc3LcFlz79-EvWHayP0Z68LkWdbiyaXgQ23eTj1qUtP1TgcIYafi Sample variance We delve into measuring variability in quantitative data, focusing on calculating sample variance and population variance. The importance of using a sample size minus one (n-1) for a more accurate estimate is highlighted. The distinction between sample mean and population mean is also clarified. https://cdn.kastatic.org/ka-youtube-converted/iHXdzfF7UEs.mp4/iHXdzfF7UEs.mp4 638 Medición de la dispersión en datos cuantitativos https://www.khanacademy.org/math/ap-statistics/summarizing-quantitative-data-ap/measuring-spread-quantitative/v/sample-standard-deviation-and-bias 2021-07-01T17:39:49Z Sample standard deviation and bias Sal shows an example of calculating standard deviation and bias. Sal Khan video https://cdn.kastatic.org/googleusercontent/vMLDdSrGOUFmBkMXPZpxFVEmxBqn0ImXjUYJO1L-LCCob1WZtBM65vnfgdWm0NWFwfDTmDQFUP7YHr9tvEDdsss Sample standard deviation and bias Sal shows an example of calculating standard deviation and bias. https://cdn.kastatic.org/ka-youtube-converted/DNAnQBhGpRw.mp4/DNAnQBhGpRw.mp4 573 Medición de la dispersión en datos cuantitativos https://www.khanacademy.org/math/ap-statistics/summarizing-quantitative-data-ap/measuring-spread-quantitative/e/sample-standard-deviation 2021-07-01T17:39:45Z Sample standard deviation Practice calculating sample standard deviation Jeff Dodds exercise https://www.khanacademy.org/math/ap-statistics/summarizing-quantitative-data-ap/measuring-spread-quantitative/v/visual-standard-deviation 2022-10-07T02:10:10.749739204Z Visually assessing standard deviation Worked examples visually assessing the standard distribution. video https://cdn.kastatic.org/googleusercontent/EZC1wRVUriltBejUN7S6HNk78dVLcUA4ulr6-dKj81gRwz8bvmVeFEqLz6abq5dnt5miak0yD7wSeRWV45KL4xc3 Visually assessing standard deviation Worked examples visually assessing the standard distribution. https://cdn.kastatic.org/ka-youtube-converted/-iCMQoCJFBY.mp4/-iCMQoCJFBY.mp4 229 Medición de la dispersión en datos cuantitativos https://www.khanacademy.org/math/ap-statistics/summarizing-quantitative-data-ap/measuring-spread-quantitative/e/visual-standard-deviation 2026-04-07T23:55:07.30621384Z Visually assess standard deviation Practice estimating standard deviation from data displays and comparing the standard deviations between sets of data. Jeff Dodds exercise https://www.khanacademy.org/math/ap-statistics/summarizing-quantitative-data-ap/measuring-spread-quantitative/v/mean-and-standard-deviation-versus-median-and-iqr 2022-10-07T00:58:19.561984208Z Mean and standard deviation versus median and IQR Learn to choose the "preferred" measures of center and spread when outliers are present in a set of data. video https://cdn.kastatic.org/ka_thumbnails_cache/1a38533b-d881-469d-a18c-fb858d9215e4_1280_720_base.png Mean and standard deviation versus median and IQR Learn to choose the "preferred" measures of center and spread when outliers are present in a set of data. https://cdn.kastatic.org/ka-youtube-converted/qNKOi08NxHs.mp4/qNKOi08NxHs.mp4 479 Medición de la dispersión en datos cuantitativos