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Get solutions of Chapter 15 Class 11 Statistics of free at teachoo. Answers to all NCERT questions and examples are solved in a step-by-step basis, with detailed explanations of each and every question.
In previous classes, we learned what data is, what mean, median, mode is.
Mean, median, mode are called central tendency. In this chapter, we will find dispersion. Dispersion means how the data is different from the central tendency. Like if we find mean, how the data is different from the mean.
Like in the figure
Both red and blue graphs have the same mean - 100.
We see that values of the blue graph are very left and right from the mean, that is, they are dispersed from the mean.
And, for the red graph, they are very close to the mean, they are less dispersed from the mean.
This is called Dispersion.
In this chapter, we will study how do we find dispersion.
The topics in the chapter include
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