condition mean min max ZT0-3 15.190900000000001 13.393450000000001 16.98835 ZT4-7 15.0143 15.0143 15.0143 ZT8-11 29.546300000000002 29.546300000000002 29.546300000000002 ZT12-15 0 0 0 ZT16-19 24.2626 24.2626 24.2626 ZT20-23 18.999650000000003 18.999650000000003 18.999650000000003