find the mean of the following frequency distribution CLASS =0-20, 20-40, 40-60, 60-80, 80-100 FREQUENCY = 17, 28, 32, 24, 19 respectively By assumed mean method.. please
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Math exam is over...!!!
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i can't draw the table but.....
xi values >10,30,50,70,90
a= 50
di values> -40,-20,0,20,40
fidi values>-680,-560,0,480,760
mean= a + Σ fidi/Σfi
=50+0/fi ......(doesn't matter since numerator is 0)
mean = 50 .......
according to my calculations
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