condition mean min max ZT0-3 85.840279 85.840279 85.840279 ZT4-7 146.0493635 146.0493635 146.0493635 ZT8-11 111.814082 111.814082 111.814082 ZT12-15 82.0413415 82.0413415 82.0413415 ZT16-19 48.717248 48.717248 48.717248 ZT20-23 74.807246 74.807246 74.807246