condition mean min max ZT0-3 2.91499 0.55114 4.60596 ZT4-7 1.4611885 1.4611885 1.4611885 ZT8-11 1.517065 1.517065 1.517065 ZT12-15 1.0816175 0.54948 1.6137549999999998 ZT16-19 0.961488 0.961488 0.961488 ZT20-23 3.825705 3.825705 3.825705