condition mean min max ZT0-3 179.687 179.687 179.687 ZT4-7 157.1795 157.1795 157.1795 ZT8-11 188.99683333333334 188.99683333333334 188.99683333333334 ZT12-15 225.4755 225.4755 225.4755 ZT16-19 266.34499999999997 266.34499999999997 266.34499999999997 ZT20-23 205.115 205.115 205.115