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    Thanks for pointing this out. I think this should have been made clear in the description of the task. I used Python's built-in function variance and got the 'wrong' result, after that I checked manually and confirmed my variance was correct, so I gave up, assuming it was a problem with the Kata. Turns out I was off by just a factor of 11/12th. Very confusing description.

  • 31668662?s=100

    Not a suggestion.

  • 46727561?s=100

    They are asking for VARIANCE. not standard deviation. calculate accordingly. also, note they want 'POPULATION' variance...not for a sample size. So, the denominator is NOT reduced by 1.