The weights (in grams) of 40 oranges picked at random from a basket are as follows:
40, 50, 60, 65, 45, 55, 30, 90, 75, 85, 70, 85, 75, 80,100 110, 70, 55, 30, 35, 45, 70, 80, 85, 95, 70, 60, 70, 75, 40, 100, 65, 60, 40, 100, 75, 110, 30, 45, 84.
Construct a frequency table as well as a cumulative frequency table.

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Solution

Sol:

Minimum observation is 30 and maximum observation is 110.

So the range is 110-30 =80

The classes of equal size covering the given data are:

(30-40), (40-50), (50-60), (60-70), (70-80), (80-90), (90-100), (100-110), (110-120)

Thus the frequency and cumulative frequency table may be given as under:

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