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

Sustainable Energy Research

Table 2 Expressive statistics for observed wind speed data at Chercher

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	1.850	2.425	0.474	−0.270	−0.393	8.730	0.086
Feb	224	1.810	2.786	0.468	0.570	0.962	13.238	0.091
Mar	248	2.310	2.931	0.539	0.230	0.498	15.422	0.086
Apr	240	2.110	3.147	0.551	0.076	−0.954	19.097	0.088
May	248	2.910	2.471	0.814	0.861	−0.388	9.240	0.086
June	240	1.500	2.827	0.390	−0.253	−0.591	13.842	0.088
July	248	2.260	3.096	0.536	0.337	−0.191	18.173	0.086
Aug	248	2.190	2.626	0.669	0.038	−1.158	11.091	0.086
Sep	240	1.860	1.905	0.524	0.913	0.169	4.234	0.088
Oct	248	1.750	1.889	0.396	1.347	2.126	4.126	0.086
Nov	240	1.360	2.452	0.341	0.258	−0.291	9.031	0.088
Dec	248	2.230	2.463	0.507	1.907	4.264	9.149	0.086
Feb–Apr	712	2.077	2.955	0.519	0.292	0.169	15.798	0.051
May–July	736	2.223	2.798	0.580	0.315	−0.390	13.416	0.050
Aug–Oct	736	1.933	2.140	0.530	0.766	0.379	6.001	0.050
Nov–Jan	736	2.002	2.446	0.441	0.631	1.193	8.969	0.050
Annual	5840	3.010	2.585	0.517	0.501	0.338	135.372	0.087