condition mean min max ZT0-3 58.869453147499996 54.685631485 63.05327481 ZT4-7 11.41106115975 8.8130367835 14.009085536 ZT8-11 18.4968014735 10.349234412 26.644368534999998 ZT12-15 27.302021240000002 25.95563448 28.648408 ZT16-19 25.429099299999997 23.307548914999998 27.550649685 ZT20-23 42.90484719 40.820430505000004 44.989263875