condition mean min max ZT0-3 54.307299 54.307299 54.307299 ZT4-7 104.178875 104.178875 104.178875 ZT8-11 86.6444575 86.6444575 86.6444575 ZT12-15 121.5189395 121.5189395 121.5189395 ZT16-19 75.07191850000001 75.07191850000001 75.07191850000001 ZT20-23 79.42591300000001 79.42591300000001 79.42591300000001