condition mean min max ZT0-3 7.48354 7.40465 7.56243 ZT4-7 5.196985 5.196985 5.196985 ZT8-11 5.14968 5.14968 5.14968 ZT12-15 0 0 0 ZT16-19 9.092285 9.092285 9.092285 ZT20-23 9.7466 9.7466 9.7466