Calculate the missing class-intervals from the following distribution:

Class-Interval Below 20 20−50 50−90 90−140 More than 140

Frequency 7 12 16 2 4

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Solution

In the given question, the class-intervals are of different width. Thus, the missing class-intervals cannot be determined.

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Similar questions

Class Interval	10−20	20−40	40−70	70−120	120−140
Frequency	4	10	26	8	2

Class interval:	0–4	4–8	8–12	12–16	16–20
Frequency	4	6	8	5	2

Class	less than 10	10−20	20−30	30−40	40−50	50−60	more than 60
Frequency	5	12	18	22	6	4	3

Class Interval	10-20	20-40	40-70	70-120	120-200	Total
Frequency	4	10	26	8	2	50

Class interval	0-4	4-8	8-12	12-16
Frequency	4	8	5	6

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Class-Interval	Below 20	20−50	50−90	90−140	More than 140
Frequency	7	12	16	2	4