condition mean min max ZT0-3 48.251483 48.251483 48.251483 ZT4-7 42.284071 42.284071 42.284071 ZT8-11 50.787135000000006 50.787135000000006 50.787135000000006 ZT12-15 50.94461 50.94461 50.94461 ZT16-19 26.3990165 26.3990165 26.3990165 ZT20-23 21.4657235 21.4657235 21.4657235