Table 3.
Results of Chi-Square goodness of fit test according to span length

Span length (mm)	1,650			3,000
Distribution	Normal	Lognormal	Weibull	Normal	Lognormal	Weibull
Test statistic	6.384	5.432	5.128	15.856	7.322	14.092
Significant level		0.05			0.05
Degree of freedom	5	5	5	5	5	5
χ2	11.070	11.070	11.070	11.070	11.070	11.070
P value for χ2test	0.271	0.365	0.400	0.007	0.198	0.015