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Hello, let's have a look at the communication.
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We have been given data as for part a, we have to construct a frequency table with 4 classes and the first one being 0 to 19.
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Frequency table will be as follows.
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Class interval and frequency our first class interval is 10 to 19, second is 20 to 29, third is 30 to 39 and the last is 40 to 49.
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And the frequencies will be 5, 8, 5 and 3.
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For part b, we have to construct the relative frequency table.
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Relative frequency table will be as follows.
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Class interval and relative frequency class interval will remain same.
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Relative frequencies will be 5 by 21, 8 by 21, 5 by 21 and 3 by 21.
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For part c, we have to construct the cumulative frequency table...