Statistical scrutiny of Weibull parameters for wind energy potential appraisal in the area of northern Ethiopia

Sustainable Energy Research

Table 3 Expressive statistics for observed wind speed data at Maychew

Months	Data observations	Wind speed range (m/s)	Mean (m/s)	Standard deviation (m/s)	Skewness	Kurtosis	Power Density (W/m²)	Q ₉₅
Jan	248	1.110	1.619	0.249	0.769	1.401	2.597	0.086
Feb	224	0.580	1.649	0.174	−0.088	−1.087	2.744	0.091
Mar	248	0.670	1.755	0.191	−0.701	−0.366	3.309	0.086
Apr	240	0.720	1.567	0.212	0.147	−1.196	2.356	0.088
May	248	1.030	1.906	0.225	−0.120	0.990	4.244	0.086
June	240	2.390	2.339	0.648	0.935	−0.062	7.840	0.088
July	248	4.960	4.110	1.443	0.062	−0.812	42.516	0.086
Aug	248	4.240	2.919	0.992	0.861	1.148	15.230	0.086
Sep	240	0.890	1.552	0.205	1.279	1.767	2.288	0.088
Oct	248	0.610	1.588	0.165	−0.151	−1.014	2.451	0.086
Nov	240	0.820	1.545	0.157	1.488	4.554	2.257	0.088
Dec	248	0.560	1.537	0.128	0.436	0.532	2.225	0.086
Feb–Apr	712	0.657	1.657	0.192	−0.214	−0.883	2.785	0.051
May–July	736	2.793	2.785	0.772	0.292	0.039	13.233	0.050
Aug–Oct	736	1.913	2.019	0.454	0.663	0.633	5.044	0.050
Nov–Jan	736	1.939	1.567	0.178	0.898	2.162	2.356	0.050
Annual	5840	5.450	2.007	0.399	0.410	0.488	90.058	0.087