condition mean min max ZT0-3 13.018550000000001 13.018550000000001 13.018550000000001 ZT4-7 15.589500000000001 15.589500000000001 15.589500000000001 ZT8-11 7.20838 7.20838 7.20838 ZT12-15 3.9029249999999998 3.9029249999999998 3.9029249999999998 ZT16-19 1.19096 1.19096 1.19096 ZT20-23 2.758575 2.758575 2.758575