Research Article
Statistical Analysis of Rainfall Trend for Volta Region in Ghana
Table 3
Descriptive statistics of annual rainfall data of coastal zone.
| | Year | Parameters | | Annual (mm) | Mean (mm) | Median (mm) | S.D. (mm) | Variance (mm) | Skewness | Kurtosis | Min (mm) | Max (mm) | Range (mm) |
| | 1981 | 899.4 | 75.0 | 43.2 | 81.4 | 6634.9 | 1.1 | −0.3 | 1.1 | 219.6 | 218.5 | | 1982 | 1247.5 | 104.0 | 60.6 | 139.7 | 19519.8 | 1.7 | 2.9 | 0.0 | 457.3 | 457.3 | | 1983 | 539.7 | 45.0 | 11.2 | 65.7 | 4324.2 | 1.4 | 0.9 | 0.0 | 183.2 | 183.2 | | 1984 | 726.9 | 60.6 | 23.8 | 76.4 | 5851.3 | 1.3 | 0.5 | 0.0 | 210.3 | 210.3 | | 1985 | 665.6 | 55.5 | 36.0 | 60.6 | 3680.5 | 1.5 | 2.5 | 0.0 | 206.8 | 206.8 | | 1986 | 495.8 | 41.3 | 32.0 | 42.4 | 1798.2 | 0.7 | −0.4 | 0.0 | 127.6 | 127.6 | | 1987 | 931.0 | 77.6 | 27.8 | 102.1 | 10438.4 | 1.7 | 3.1 | 0.0 | 339.9 | 339.9 | | 1988 | 798.3 | 66.5 | 72.1 | 51.1 | 2614.5 | −0.1 | −1.5 | 0.0 | 143.2 | 143.2 | | 1989 | 949.9 | 79.2 | 43.9 | 82.7 | 6847.9 | 0.5 | −1.4 | 0.0 | 213.8 | 213.8 | | 1990 | 655.9 | 54.7 | 46.6 | 47.2 | 2236.4 | 0.5 | −1.0 | 0.0 | 131.7 | 131.7 | | 1991 | 1298.1 | 108.2 | 30.8 | 148.9 | 22176.2 | 1.4 | 0.9 | 0.0 | 443.5 | 443.5 | | 1992 | 359.2 | 29.9 | 10.4 | 51.1 | 2614.6 | 2.5 | 6.7 | 0.0 | 176.5 | 176.5 | | 1993 | 759.3 | 63.3 | 64.9 | 44.8 | 2008.1 | 0.1 | −0.9 | 0.0 | 132.3 | 132.3 | | 1994 | 700.9 | 58.4 | 37.5 | 66.1 | 4365.8 | 1.4 | 1.4 | 0.0 | 207.9 | 207.9 | | 1995 | 859.2 | 71.6 | 31.5 | 94.1 | 8858.3 | 2.0 | 4.2 | 0.0 | 321.1 | 321.1 | | 1996 | 992.1 | 82.7 | 36.5 | 103.9 | 10793.1 | 1.1 | 0.0 | 0.0 | 283.8 | 283.8 | | 1997 | 1191.2 | 99.3 | 29.0 | 168.1 | 28252.3 | 2.7 | 8.3 | 0.0 | 598.3 | 598.3 | | 1998 | 484.4 | 40.4 | 14.1 | 58.3 | 3399.8 | 1.7 | 2.4 | 0.0 | 183.6 | 183.6 | | 1999 | 716.0 | 59.7 | 31.9 | 74.7 | 5590.8 | 1.6 | 1.5 | 2.8 | 223.6 | 220.8 | | 2000 | 394.3 | 32.9 | 21.9 | 34.8 | 1213.3 | 0.7 | −0.7 | 0.0 | 100.1 | 100.1 | | 2001 | 779.2 | 64.9 | 23.7 | 74.7 | 5587.9 | 0.7 | −1.4 | 0.0 | 189.4 | 189.4 | | 2002 | 842.6 | 70.2 | 45.6 | 89.8 | 8065.9 | 2.1 | 4.9 | 0.0 | 315.3 | 315.3 | | 2003 | 1061.9 | 88.5 | 30.9 | 131.8 | 17377.8 | 2.1 | 4.7 | 3.5 | 446.4 | 442.9 | | 2004 | 698.4 | 58.2 | 49.1 | 53.9 | 2904.5 | 0.6 | −0.9 | 0.0 | 147.3 | 147.3 | | 2005 | 790.8 | 65.9 | 57.9 | 61.9 | 3841.2 | 0.3 | −1.6 | 0.0 | 157.3 | 157.3 | | 2006 | 746.0 | 62.2 | 36.7 | 67.9 | 4617.8 | 0.9 | −0.1 | 0.0 | 202.4 | 202.4 | | 2007 | 897.1 | 74.8 | 56.5 | 71.2 | 5077.8 | 1.0 | 0.7 | 0.0 | 232.0 | 232.0 | | 2008 | 767.3 | 63.9 | 39.6 | 71.4 | 5108.2 | 1.5 | 1.4 | 0.0 | 213.2 | 213.2 | | 2009 | 1070.0 | 89.2 | 27.7 | 139.8 | 19570.4 | 2.2 | 5.5 | 0.2 | 477.3 | 477.1 | | 2010 | 957.4 | 79.8 | 78.5 | 73.6 | 5416.9 | 0.6 | −0.4 | 0.0 | 224.3 | 224.3 | | 2011 | 893.5 | 74.5 | 57.2 | 86.7 | 7522.1 | 1.4 | 2.1 | 0.0 | 285.7 | 285.7 |
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