condition mean min max ZT0-3 29.749825 29.749825 29.749825 ZT4-7 31.082123 31.082123 31.082123 ZT8-11 28.472203 28.472203 28.472203 ZT12-15 35.128255499999995 35.128255499999995 35.128255499999995 ZT16-19 26.12115 26.12115 26.12115 ZT20-23 27.2587175 27.2587175 27.2587175