condition mean min max ZT0-3 0.8375094114999999 0.7824366979999999 0.892582125 ZT4-7 0.91524523 0.7113543615 1.1191360985 ZT8-11 0.9057891255000001 0.5784203345000001 1.2331579165000002 ZT12-15 1.18870402175 0.9221548664999999 1.455253177 ZT16-19 2.08733068575 1.791617767 2.3830436045 ZT20-23 2.8197476965 2.7340123815 2.9054830115