condition mean min max ZT0-3 112.2 112.2 112.2 ZT4-7 122.3 122.3 122.3 ZT8-11 168.39999999999998 168.39999999999998 168.39999999999998 ZT12-15 152.25 152.25 152.25 ZT16-19 184.65 184.65 184.65 ZT20-23 155.35 155.35 155.35