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Problem: less than type cumulative frequency curve {{10-20,15},{20-30,25},{30-40,20},{40-50,12},{50-60,8}} [ Calculator, Method and examples ]

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Your problem -> less than type cumulative frequency curve {{10-20,15},{20-30,25},{30-40,20},{40-50,12},{50-60,8}}

To draw Less than type cumulative frequency curve, we first prepare the following table

 Class Frequencyf < Upper cf 0 - 10 - 10 0 10 - 20 15 20 15 20 - 30 25 30 40 30 - 40 20 40 60 40 - 50 12 50 72 50 - 60 8 60 80

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