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Whatever this kata improves, it was much mor fun to solve it, than boring "code all day to get an one digit answer" katas.
I really glad that this kata exists, it's just fresh air and why I prefer Codewars to Leetcode and other.
You're calculating the "sample variance" while the "population variance" is required. I think the link in the notes includes the explanation on how to get the expected result.
Can you elaborate please? What do you mean divide by n ? What is n
They want the population variance (divide by
n). The larger number is the sample variance, corresponding to a denominator ofn - 1.I don't get why is
variance("London", data) == 57.42(833333333374)while MATLAB shows me62.649- I also get this value by using1/n * sum((x_i - m)^2). What's wrong? What am I missing here?