condition mean min max ZT0-3 9.599001 9.599001 9.599001 ZT4-7 10.679719500000001 10.679719500000001 10.679719500000001 ZT8-11 9.6368085 9.6368085 9.6368085 ZT12-15 11.163962999999999 11.163962999999999 11.163962999999999 ZT16-19 9.5572695 9.5572695 9.5572695 ZT20-23 10.4595205 10.4595205 10.4595205