condition mean min max ZT0-3 9.910569 9.910569 9.910569 ZT4-7 9.193984 9.193984 9.193984 ZT8-11 8.174286 8.174286 8.174286 ZT12-15 10.031552999999999 10.031552999999999 10.031552999999999 ZT16-19 9.282916499999999 9.282916499999999 9.282916499999999 ZT20-23 10.1203515 10.1203515 10.1203515