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Table 4 Mann Kendall and Sen’s Slope analysis of rainfall

From: Agricultural community-based impact assessment and farmers’ perception of climate change in selected Ecological Zones in Nigeria

Rainfall (mm)
Month Ondo Ogun Kwara
S Z Trend Slope S Z Trend Slope S Z Trend Slope
January 65 0.91   0.000 −4 −0.04 0.000 −5 −0.07   0.000
February 32 0.43   0.000 65 0.87   0.167 −20 −0.31   0.000
March 28 0.37   0.529 91 1.23   0.890 −81 −1.24   −0.690
April −46 −0.61   −0.725 11 0.14   0.000* 84 1.29   1.429
May −83 −1.12   −0.920 83 1.12   1.317 8 0.11   0.058
June 75 1.01   1.053 73 0.98   1.742 42 0.64   0.704
July 87 1.22   2.746* 40 0.53   0.938 58 0.88   0.974
August 65 0.87   1.523 29 0.38   0.628 −21 −0.31   −0.324
September 26 0.34   0.361 127 1.72   3.026 66 10.1  +  1.529
October −67 −0.90   −1.146 101 1.36   2.000 160 2.46  +  3.994
November 98 1.32   0.563 185 2.51  +  1.375 1 0.00   0.000
December −36 −0.52   0.000 42 0.59   0.000 −11 −0.22   0.000
Overall 48 0.64   1.297 113 1.59   12.667* 69 1.05   4.000
  1. ( +), Positive Trend; (-), Negative Trend; (), Random; (*), Significant at 0.05