The mean and standard deviation of 20 observations are found to be 10 and 2 , respectively. On rechecking, it was found …
Q1
The mean and standard deviation of 20 observations are found to be 10 and 2 , respectively. On rechecking, it was found that an observation by mistake was taken 8 instead of 12. The correct standard deviation is
[JEE Main 2024, 06 Apr (Shift 1)]
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