Table 2.

Descriptive statistics.

	MZP	AVEGTP	CO2	PRPT	TWL
Mean	3086	21.00	0.697	298.48	7.954
Median	2797	21.07	0.697	310.9	8.270
Maximum	7883	21.87	0.919	392.5	8.590
Minimum	1179	19.82	0.506	187.5	6.410
Std. Dev.	1912	0.495	0.105	60.33	0.691
Skewness	0.839	0.413	0.193	0.133	0.957
Kurtosis	2.678	2.664	2.343	1.840	2.514
Jarque-Bera	3.773	1.027	0.750	1.827	5.038
Probability	0.152	0.598	0.687	0.401	0.080
Sum	95669	650.95	21.60	9253	246.5
Observations	31	31	31	31	31