condition mean min max ZT0-3 293.0788888666667 293.0788888666667 293.0788888666667 ZT4-7 216.3138889 216.3138889 216.3138889 ZT8-11 96.26222221 96.26222221 96.26222221 ZT12-15 100.70444444333333 100.70444444333333 100.70444444333333 ZT16-19 388.23 388.23 388.23 ZT20-23 294.8688889 294.8688889 294.8688889