https://www.khanacademy.org/math/class-6-ncf/x04ca845a9a148c80:data-handling-and-presentation/x04ca845a9a148c80:collecting-and-organising-data/v/intro-to-data-handling 2020-11-03T12:02:05Z Intro to data handling The three steps of data handling are collection, organisation and interpretation of data. Let's look at what these steps are. Aanand Srinivas video https://cdn.kastatic.org/googleusercontent/XE-8sLHqnc7UM-68qMISZk2fj2ovD6Xa4-j--JHyPkSqWhwS2xxTn_hM_-QgdH88pCmVZiBBILAas-YzO02DBZaF Intro to data handling The three steps of data handling are collection, organisation and interpretation of data. Let's look at what these steps are. https://cdn.kastatic.org/ka-youtube-converted/iieY7mgGzzY.mp4/iieY7mgGzzY.mp4 351 Statistics https://www.khanacademy.org/math/class-9-tg/x06d55bfa213a79fd:statistics/x06d55bfa213a79fd:presentation-of-data/v/frequency-distribution-table 2025-10-06T14:00:44.591197305Z Frequency distribution table In this video, we explore how to create a frequency distribution table and unpack the essential terms that make it meaningful. You'll learn how to define class intervals and calculate their size, identify the lower and upper limits of each class, and distinguish between inclusive and exclusive class formats—especially useful when handling discrete versus continuous data. We also explain how to find the class mark (or midpoint), which plays a key role in further statistical analysis like calculating the mean. Using clear visuals and real-world examples, this tutorial makes organizing raw data intuitive and accessible for learners at any level. Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now!Unit link 00:00 Introduction 01:42 Class interval, lower and upper limit and class size 02:58 Constructing frequency distribution table 04:26 Filling in tally marks and the frequency 05:56 Inclusive classes 06:39 Real limits 08:25 Exclusive classes 09:41 Class mark 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 Khan Academy Khan Academy video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Frequency distribution table In this video, we explore how to create a frequency distribution table and unpack the essential terms that make it meaningful. You'll learn how to define class intervals and calculate their size, identify the lower and upper limits of each class, and distinguish between inclusive and exclusive class formats—especially useful when handling discrete versus continuous data. We also explain how to find the class mark (or midpoint), which plays a key role in further statistical analysis like calculating the mean. Using clear visuals and real-world examples, this tutorial makes organizing raw data intuitive and accessible for learners at any level. Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now!Unit link 00:00 Introduction 01:42 Class interval, lower and upper limit and class size 02:58 Constructing frequency distribution table 04:26 Filling in tally marks and the frequency 05:56 Inclusive classes 06:39 Real limits 08:25 Exclusive classes 09:41 Class mark 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 Khan Academy https://cdn.kastatic.org/ka-youtube-converted/_oucDwBKhEM.mp4/_oucDwBKhEM.mp4 636 Statistics https://www.khanacademy.org/math/ka-math-class-11/x0419e5b3b578592a:statistics-ncert-new/x0419e5b3b578592a:introduction/v/statistics-intro-mean-median-mode-indian-accent 2025-06-04T10:04:13.13703146Z Statistics intro: Mean, median, & mode The mean (average) of a data set is found by adding all numbers in the data set and then dividing by the number of values in the set. The median is the middle value when a data set is ordered from least to greatest. The mode is the number that occurs most often in a data set. Skyloom (Dubbing) video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Statistics intro: Mean, median, & mode The mean (average) of a data set is found by adding all numbers in the data set and then dividing by the number of values in the set. The median is the middle value when a data set is ordered from least to greatest. The mode is the number that occurs most often in a data set. https://cdn.kastatic.org/ka-youtube-converted/m4ykdv0DE_A.mp4/m4ykdv0DE_A.mp4 471 Statistics https://www.khanacademy.org/math/class-9-tg/x06d55bfa213a79fd:statistics/x06d55bfa213a79fd:measures-of-central-tendency/v/finding-mean-of-the-grouped-data-with-frequency 2025-06-20T12:46:54.939615213Z Finding mean of the grouped data with frequency How to find the mean of the grouped data when the frequency is given? FInd out in this video, which covers the comprehensive understanding of the concept with an example. Devashish Phadnis video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Finding mean of the grouped data with frequency How to find the mean of the grouped data when the frequency is given? FInd out in this video, which covers the comprehensive understanding of the concept with an example. https://cdn.kastatic.org/ka-youtube-converted/ytv_00-L0OY.mp4/ytv_00-L0OY.mp4 300 Statistics https://www.khanacademy.org/math/class-9-tg/x06d55bfa213a79fd:statistics/x06d55bfa213a79fd:measures-of-central-tendency/v/median-and-its-use 2024-04-08T19:02:37.104158325Z Median and its use Median is a central tendency measure, and you must know why median is useful. Learn the very basics of what median is and what are its advantages over using the mean. Devashish Phadnis video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Median and its use Median is a central tendency measure, and you must know why median is useful. Learn the very basics of what median is and what are its advantages over using the mean. https://cdn.kastatic.org/ka-youtube-converted/tEXWhi1gAks.mp4/tEXWhi1gAks.mp4 381 Statistics https://www.khanacademy.org/math/class-9-tg/x06d55bfa213a79fd:statistics/x06d55bfa213a79fd:measures-of-central-tendency/v/median-of-a-frequency-distribution 2025-10-06T14:00:44.591197305Z Median of a frequency distribution In this video, we explore how to find the median in a frequency distribution—an essential measure of central tendency that tells us the middle value of a dataset. We begin by introducing the concept of median. Then, we walk through the process of calculating cumulative frequency (CF), which helps us locate the median class. You'll learn the role of n, the total frequency, and how to determine whether n is odd or even—a key step in identifying the median position. We also explain the median formula used for grouped data, breaking it down into intuitive steps with examples. Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now!Unit link 00:00 Introduction to median 01:02 Median of a frequency distribution 01:49 Finding cf 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 Khan Academy Khan Academy video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Median of a frequency distribution In this video, we explore how to find the median in a frequency distribution—an essential measure of central tendency that tells us the middle value of a dataset. We begin by introducing the concept of median. Then, we walk through the process of calculating cumulative frequency (CF), which helps us locate the median class. You'll learn the role of n, the total frequency, and how to determine whether n is odd or even—a key step in identifying the median position. We also explain the median formula used for grouped data, breaking it down into intuitive steps with examples. Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now!Unit link 00:00 Introduction to median 01:02 Median of a frequency distribution 01:49 Finding cf 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 Khan Academy https://cdn.kastatic.org/ka-youtube-converted/kIUk4M8gum8.mp4/kIUk4M8gum8.mp4 367 Statistics https://www.khanacademy.org/math/class-9-tg/x06d55bfa213a79fd:statistics/x06d55bfa213a79fd:deviation-in-values-of-central-tendency/v/deviation-in-values-of-central-tendency 2025-10-06T14:00:44.591197305Z Deviation in Values of Central Tendency This video explores how changing each data value in a dataset affects the mean, median, and mode, using clear logic and simple examples. When every value is increased or decreased by the same amount, the mean shifts by that exact amount because it reflects the total sum. The median, being the middle value, also moves consistently with uniform changes, since the relative order of values remains intact. Through intuitive reasoning and visual comparisons, the video highlights how each measure responds differently to data changes. Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now!Unit link 00:00 Effect of deviation on mean 02:12 Rationale behind the effect 04:36 Effect of deviation on median 05:50 Effect of deviation on mode 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 Khan Academy Khan Academy video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Deviation in Values of Central Tendency This video explores how changing each data value in a dataset affects the mean, median, and mode, using clear logic and simple examples. When every value is increased or decreased by the same amount, the mean shifts by that exact amount because it reflects the total sum. The median, being the middle value, also moves consistently with uniform changes, since the relative order of values remains intact. Through intuitive reasoning and visual comparisons, the video highlights how each measure responds differently to data changes. Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now!Unit link 00:00 Effect of deviation on mean 02:12 Rationale behind the effect 04:36 Effect of deviation on median 05:50 Effect of deviation on mode 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 Khan Academy https://cdn.kastatic.org/ka-youtube-converted/SW3URqcQmzE.mp4/SW3URqcQmzE.mp4 382 Statistics https://www.khanacademy.org/math/revision-tg-math-class-9/x6c9499d6e7016acd:week-2/x6c9499d6e7016acd:statistics/e/revision-statistics-tg-class-9 2026-02-18T21:20:35.275198076Z Revision statistics TG class 9 . Khan Academy exercise