condition mean min max ZT0-3 1.1588417500000001 1.0579585 1.259725 ZT4-7 1.342645 1.342645 1.342645 ZT8-11 1.324665 1.324665 1.324665 ZT12-15 0 0 0 ZT16-19 2.31409 2.31409 2.31409 ZT20-23 1.2648000000000001 1.2648000000000001 1.2648000000000001