condition mean min max ZT0-3 9.2307175 8.42573 10.035705 ZT4-7 9.978345000000001 9.978345000000001 9.978345000000001 ZT8-11 10.36175 10.36175 10.36175 ZT12-15 0 0 0 ZT16-19 13.164549999999998 13.164549999999998 13.164549999999998 ZT20-23 11.29705 11.29705 11.29705