the mean of 15 observation is 16. if each observation in the data is decreased by 25% , what will be the new mean of the data?( please give the answer with steps)
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the mean would also decrease by 25% ie 16*25/100=4
16-4=12 is the new mean
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sum of 15 observations /15
=16
if each observation decreased by 25%
The sum becomes 75%
New mean = 75% of original sum/15=3/4 × original mean =3/4× 16 =12
=16
if each observation decreased by 25%
The sum becomes 75%
New mean = 75% of original sum/15=3/4 × original mean =3/4× 16 =12
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