condition mean min max ZT0-3 1.56318712675 1.153886371 1.9724878824999998 ZT4-7 1.88273636725 1.560640583 2.2048321515 ZT8-11 2.8082775405 2.1366074655 3.4799476155 ZT12-15 3.77110321 3.1131412075 4.4290652125 ZT16-19 4.04092303 3.7614760924999997 4.3203699675 ZT20-23 4.07709374575 4.0588090845 4.095378407