condition mean min max ZT0-3 2.9565799999999998 2.91493 2.99823 ZT4-7 5.47315 5.47315 5.47315 ZT8-11 2.80105 2.80105 2.80105 ZT12-15 0 0 0 ZT16-19 3.70458 3.70458 3.70458 ZT20-23 5.72963 5.72963 5.72963