condition mean min max ZT0-3 325.4 325.4 325.4 ZT4-7 314.4 314.4 314.4 ZT8-11 281.20000000000005 281.20000000000005 281.20000000000005 ZT12-15 381.54999999999995 381.54999999999995 381.54999999999995 ZT16-19 363.65 363.65 363.65 ZT20-23 370.1 370.1 370.1