condition mean min max ZT0-3 480.44832 480.44832 480.44832 ZT4-7 421.0439505 421.0439505 421.0439505 ZT8-11 291.5704745 291.5704745 291.5704745 ZT12-15 289.3301395 289.3301395 289.3301395 ZT16-19 167.0343885 167.0343885 167.0343885 ZT20-23 120.70912799999999 120.70912799999999 120.70912799999999