condition mean min max ZT0-3 49.0 49.0 49.0 ZT4-7 197.3 197.3 197.3 ZT8-11 192.64999999999998 192.64999999999998 192.64999999999998 ZT12-15 152.85 152.85 152.85 ZT16-19 86.85 86.85 86.85 ZT20-23 64.6 64.6 64.6