condition mean min max ZT0-3 22.68905 22.3886 22.9895 ZT4-7 23.9406 23.9406 23.9406 ZT8-11 23.4707 23.4707 23.4707 ZT12-15 0 0 0 ZT16-19 24.7247 24.7247 24.7247 ZT20-23 24.96215 24.96215 24.96215