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Tagged with descriptive-statistics mathematica
3 questions
1
vote
0
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105
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How can I incrementally calculate the 4 central moments in statistics (mean, standard deviation, skewness and curtosis) when a value is removed?
I'm incrementally calculating the 4 central moments. When a value x is added and n, M1, M2, M3 and M4 are some predefined values, I'm using the following algorithm:
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- 11
6
votes
1
answer
6k
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Comparing two datasets with same variable
thanks in advance for anyone taking the time to read/answer this.
I am comparing a ground-sourced dataset versus a satellite-sourced dataset for weather conditions, such as temperature. Both sets are ...
- 175
16
votes
1
answer
1k
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Why do Excel and WolframAlpha give different values for skewness
for the following 3 values 222,1122,45444
WolframAlpha gives 0.706
Excel, using =SKEW(222,1122,45444) gives 1.729
What explains the difference?
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