Table 2. Correlation coefficients of internal temperature (package), internal volume, and total weight of refrigerant

	Small package internal temperature	Small package internal volume	Total weight of refrigerant
Small package internal temperature	1.000	NA2)	NA
Small package internal volume	0.5701)	1.000	NA
Total weight of refrigerant	–0.264	0.234	1.000

Highly significant statistically at p<0.05.
Not applicable.