condition mean min max ZT0-3 26.171100000000003 26.171100000000003 26.171100000000003 ZT4-7 22.304499999999997 22.304499999999997 22.304499999999997 ZT8-11 20.90015 20.90015 20.90015 ZT12-15 21.9496 21.9496 21.9496 ZT16-19 25.48915 25.48915 25.48915 ZT20-23 24.030250000000002 24.030250000000002 24.030250000000002