This playlist covers all the questions, concepts, theorems and examples of chapter 14 (Statistics) of class 9, NCERT textbook. Click a thumbnail to watch the tutorial.
It is recommended to watch the introductory video, displayed as first video in the list, to understand the underlying concepts of statistics. This video is sufficient for students to understand and solve class 9 chapter 14 statistics chapter. The introduction video covers the concepts of Primary and Secondary data, grouped and ungrouped Frequency Distribution Tables, Class Interval, Overlapping and Non overlapping Class Intervals, Upper and Lower Class Limits. Every concept has been explained in detail in simple day-to-day language with very simple examples.
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You may also test your knowledge about the concepts of statistics (Class 9 level) by attempting the following quiz. In this video, you will be asked a set of 15 objective questions to test your knowledge of the concepts of probability. You will be given 15 to 30 seconds to answer after which the correct answer would be displayed. The questions cover mean, median, mode, range, grouped data, classes, class Interval, Histograms, Frequency Polygons, Bar Graphs. Good luck!!!
Following three types of graphs are very basic graphs that one must learn in statistics:
- Bar Graphs
- Histogram (of Uniform as well as varying width)
- Frequency Polygons
It is very important for students to have a very good understanding of these topics, not just for class 9 statistics but in general as well. You can get an idea from the charts that are displayed during cricket matches: Score comparison, averages of players in different years or countries etc.
