In Form 4, we have already learnt about the ways to interpret the dispersion for ungrouped data. For a grouped data, we can observe the dispersion by using histogram and frequency polygon.

Before that, we need to know the class interval, lower limit, upper limit, lower boundary, upper boundary and cumulative frequency that can be obtained from a frequency table.

Let’s watch this video to get explanation about this subtopic (7.1: Dispersion)

Introduction to Dispersion
What we can obtained in frequency table?
How to construct histogram?
How to construct frequency polygon?
How to construct ogive?
What is quartile?

Hopefully, all this video will help your understanding for this subtopic. If you have any inquiry, you can directly comment.

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