condition mean min max ZT0-3 233.155134 233.155134 233.155134 ZT4-7 482.5351195 482.5351195 482.5351195 ZT8-11 931.1404265 931.1404265 931.1404265 ZT12-15 749.2378105 749.2378105 749.2378105 ZT16-19 454.73541 454.73541 454.73541 ZT20-23 550.354405 550.354405 550.354405