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Question: Which of the following statement(s) is/are true?
I. On a pareto chart, the frequencies should be represented on the y - axis.
II. In a frequency distribution, the number of classes should be between 5 and 20.
III. The three types of frequency distributions are histograms, frequency polygons and ogives.


A ) I and II only
B ) II only
C ) III only
D ) all are true

Steps to derive

1 On a pareto chart, the qualitative or categorical data is represented on the x - axis and frequencies are represented on the y - axis.

2 In a frequency distribution, there should be between 5 and 20 classes. Although there is no hard-and-fast rule for the number of classes contained in a frequency distribution, it is of the atmost importance to have enough classes to present a clear description of the collected data.

3 The three types of frequency distributions are the categorical frequency distribution, the grouped frequency distribution and the ungrouped frequency distribution.

4 So, only statements I and II are true.



Hence the right answer is Option A

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