the mean of ten observations is 15.3. if two observations 6 and 9 are replaced by 8 and 14 respectively, find the new mean.
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mean of 10 observations = 15.3
multiply by 10 = 15.3*10 = 153
now ATQ
153 - 6-9+8+14
153-15+22
153+7
160
divide by 10
160/10 = 16
new mean = 16
we will multiply or divide by 10 as the number of observations are 10.
multiply by 10 = 15.3*10 = 153
now ATQ
153 - 6-9+8+14
153-15+22
153+7
160
divide by 10
160/10 = 16
new mean = 16
we will multiply or divide by 10 as the number of observations are 10.
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