condition mean min max ZT0-3 10.212213 10.212213 10.212213 ZT4-7 9.7322275 9.7322275 9.7322275 ZT8-11 9.9676485 9.9676485 9.9676485 ZT12-15 10.29976 10.29976 10.29976 ZT16-19 9.838465 9.838465 9.838465 ZT20-23 9.082450000000001 9.082450000000001 9.082450000000001