condition mean min max ZT0-3 125.496786 125.496786 125.496786 ZT4-7 127.4924025 127.4924025 127.4924025 ZT8-11 157.72985549999999 157.72985549999999 157.72985549999999 ZT12-15 157.8120395 157.8120395 157.8120395 ZT16-19 147.35192949999998 147.35192949999998 147.35192949999998 ZT20-23 146.5794305 146.5794305 146.5794305