condition mean min max ZT0-3 8.722385 8.722385 8.722385 ZT4-7 6.157475 6.157475 6.157475 ZT8-11 5.684559999999999 5.684559999999999 5.684559999999999 ZT12-15 4.344475 4.344475 4.344475 ZT16-19 10.167075 10.167075 10.167075 ZT20-23 8.06542 8.06542 8.06542