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Q.

Find the mean deviation about median for the following data.

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a

10.34

b

10.50

c

10.40

d

10.37

answer is A.

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Detailed Solution

N2=502=25C=14,f=14,l=20,h=10Mdian⁡M=1+N2−Cf×h=20+25−1414×10=20+11×1014=20+7.86=27.86∴ Mean deviation about median =Σfixi−MΣfi=517.1650=10.34

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