From the following data, calculate the lower limit of the first class and upper limit of the last class.

Daily Wages Less than 120 120−140 140−160 160−180 Above 180

No. of Workers 35 12 10 40 13

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Solution

In the given question, the size of each class is 20. Thus, maintaining the uniformity, we take the first class as 100-120 and the last class as 180-200. Therefore, the lower limit of the first class-interval is 120 − 20 = 100 and the upper limit of the last class is 180 + 20 = 200.

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Write the above distribution as less than type cumulative frequency distribution.

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Daily Wages	Less than 120	120−140	140−160	160−180	Above 180
No. of Workers	35	12	10	40	13

From the following data, calculate the lower limit of the first class and upper limit of the last class. Daily Wages Less than 120 120−140 140−160 160−180 Above 180 No. of Workers 35 12 10 40 13

In the given question, the size of each class is 20. Thus, maintaining the uniformity, we take the first class as 100-120 and the last class as 180-200. Therefore, the lower limit of the first class-interval is 120 − 20 = 100 and the upper limit of the last class is 180 + 20 = 200.

From the following data, calculate the lower limit of the first class and upper limit of the last class.

Daily Wages Less than 120 120−140 140−160 160−180 Above 180

No. of Workers 35 12 10 40 13