condition mean min max ZT0-3 0.9790954999999999 0.9193359999999999 1.0388549999999999 ZT4-7 1.76022 1.76022 1.76022 ZT8-11 1.8661750000000001 1.8661750000000001 1.8661750000000001 ZT12-15 0 0 0 ZT16-19 2.09335 2.09335 2.09335 ZT20-23 1.2821 1.2821 1.2821