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NDA Math Statistics

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Question : 21

Total: 100

The mean of 100 observations is 50 and the standard deviation is 10. If 5 is subtracted from each observation and then it is divided by 4, then what will be the new mean and the new standard deviation respectively?

45,5
11.25,1 .25
11.25,2 .5
12.5, 2. 5

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