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Indu Dhiman posted an Question
May 22, 2021 • 00:14 am
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30 points
30 points
- UGC NET
- Economics
Question: 30/50 unit solved papers (1-10) - economics the mean and s.d. of a data set are 10 and 3. if every observation is increased by 2 then the coefficient
Question: 30/50 Unit Solved Papers (1-10) - Economics The mean and S.D. of a data set are 10 and 3. If every observation is increased by 2 then the coefficient of variation will be:
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Reshma gupta![best-answer]()
If a constant, k, is added to each number in a set of data, the mean will be increased by k and the standard deviation will be unaltered (since the spread of the data will be unchanged). previous mean=10 s.d.=3 coefficient of variation=3/10=0.30 new mean would be 10+2=12 new s.d.=3 new coefficient of variation=s.d./mean 3/12=1/4=.25 so coefficient of variation decreased.
but here answer is 30 instead of 25
no it should be 25 the right answer.