condition mean min max ZT0-3 3.5836925 3.53121 3.636175 ZT4-7 2.690455 2.690455 2.690455 ZT8-11 3.51574 3.51574 3.51574 ZT12-15 0 0 0 ZT16-19 3.494445 3.494445 3.494445 ZT20-23 3.865755 3.865755 3.865755