condition mean min max ZT0-3 5.210930660999999 5.185128541999999 5.23673278 ZT4-7 6.01139636375 4.5073453985 7.515447329000001 ZT8-11 10.61194324625 8.6280899825 12.59579651 ZT12-15 9.19368760825 7.891386836500001 10.49598838 ZT16-19 5.70977868975 5.492286344 5.9272710355000005 ZT20-23 8.92138920175 7.7462341585 10.096544244999999