condition mean min max ZT0-3 33.4228968525 28.97840342 37.867390285 ZT4-7 26.0361678675 23.216744005000002 28.85559173 ZT8-11 38.70212557 26.322813415 51.081437725 ZT12-15 52.4208677775 51.92905222 52.912683335 ZT16-19 52.9520139975 52.41210074 53.491927255 ZT20-23 41.1120179225 35.214561515 47.00947433