condition mean min max ZT0-3 0.34975631625000003 0.128081744 0.5714308885 ZT4-7 1.65424306225 1.2625271969999998 2.0459589275 ZT8-11 2.4130046519999997 2.2697962929999997 2.5562130109999996 ZT12-15 3.7681096775 2.5047045555 5.0315147995 ZT16-19 3.8698271142499996 3.0008002425 4.738853986 ZT20-23 9.07420400225 7.3818996415 10.766508363