3 and 4th question any plzz solve
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this is 3rd ans
step deviation method:
x=a+£fidi/£fi
here the assumed mean is 80
therefore
x=80+3280/45
=72.888888888
step deviation method:
x=a+£fidi/£fi
here the assumed mean is 80
therefore
x=80+3280/45
=72.888888888
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