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1) In a frequency distribution of 100 families given below the number of families corresponding to expenditure groups 20-40 and 60-80 are missing from the table. However, the median is known to be 50.
Expenditure group
0-20 20-40 40-60 60-80 80-100
No. of families
14 f2 27 f4 15
a) Find the missing frequencies.
b) Find mean, mode, variance, standard deviation, range, mean deviation for mean and median
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