condition mean min max ZT0-3 10.813500000000001 10.813500000000001 10.813500000000001 ZT4-7 9.275265000000001 9.275265000000001 9.275265000000001 ZT8-11 7.608414999999999 7.608414999999999 7.608414999999999 ZT12-15 9.114905 9.114905 9.114905 ZT16-19 12.03115 12.03115 12.03115 ZT20-23 10.275549999999999 10.275549999999999 10.275549999999999