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Question: The daily water consumption (in m3) of 25 different textile mills recorded by the Water Authority is shown.
24002700110018302200
22501400172026201580
16402100136017502600
14401900252017001210
23002050150019902320

Identify the frequency of each class by constructing a frequency distribution with six classes.


A ) 3, 5, 6, 4, 5 and 4
B ) 3, 4, 6, 3, 5 and 4
C ) 2, 5, 6, 4, 3 and 5
D ) 3, 5, 5, 3, 5 and 4

Steps to derive

1 Range of the data = higher value - lower value = 2700 - 1100 = 1600

2 Width = rangenumber of classes = 16006 = 266.67 270

3 Constuct the class limits (daily water consumption) with width 270, so that the least and highest values has been included.

4 The class limits, boundaries, tally marks and the frequency for each class (number of tally marks) are shown in the table.



6 The frequency of each class in the frequency distribution are 3, 4, 6, 3, 5 and 4.



Hence the right answer is Option B

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