the mean of 10 observation was calculated as 40 . it was detected on re checking that the value of one observation was wrongly copied as 15 insted of 45. fing the correct mean
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n1=10,
mean=40,
Ex=40×10,
=400,
corrected Ex=400-15+45,
=430.
hence new mean is 430.
mean=40,
Ex=40×10,
=400,
corrected Ex=400-15+45,
=430.
hence new mean is 430.
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