condition mean min max ZT0-3 2.66170897275 1.029162579 4.2942553665 ZT4-7 3.84898358775 3.0969197205 4.601047455 ZT8-11 1.56141208825 1.025697503 2.0971266735 ZT12-15 2.4011797450000003 1.740201501 3.062157989 ZT16-19 3.08906168875 2.6979598495 3.4801635280000003 ZT20-23 5.4274833825 5.3277129595 5.527253805499999