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Comment on New Standard Deviation
Quick and easy way to solve
That's a great strategy.
That's a great strategy. However, we need to recognize that this approach allows us to eliminate C, D and E.
The answer can still be either A or B, because if d = 0, then 10d = 0
Cheers,
Brent
See I don't use complex
we can suppose every number here is 1 so the mean is 1, SD 1-1 is 0
you add 1 into every number the mean is 2, 2-2 is still 0
That works!
That works!