Age 5-14,15-24,25-34,35-44,45-54,55-64 no.of cases 6,11,21,23,14,5 find mean and median
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hy......
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mean =sum of observation/total no. of observation
mean=5+14+15+24+25+34+35+44+45+54+55+64+6+11+21+23+14+5/18
=495/18
=27.5
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