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Find the dispersion of the following data centred size –

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Find the dispersion of the following data centred size –

Central size 32-38 38-44 44-50 50-56 56-62 62-68
No. of students 3 6 9 13 8 5
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= 36[2 - 0.07838] = 36 x 1.92 = 69.17832

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