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Mann-Kendall statistic S
Variance S
where
- g
is the number of groups of tied data
- tp
the number of tied data in the p-th group
...
the number of sampling times that contain multiple data
- u_p
the number of multiple data in the qth time period
Z statistic
Z=
, if S > 0,
- Z = 0
, if S = 0
, if S < 0,
Slope
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