condition mean min max ZT0-3 8.376940000000001 8.376940000000001 8.376940000000001 ZT4-7 3.41376 3.41376 3.41376 ZT8-11 2.373345 2.373345 2.373345 ZT12-15 4.25973 4.25973 4.25973 ZT16-19 11.817450000000001 11.817450000000001 11.817450000000001 ZT20-23 10.50718 10.50718 10.50718