condition mean min max ZT0-3 454.8692469 358.276941 551.4615528 ZT4-7 151.55609825000002 134.70013175000003 168.41206475 ZT8-11 111.02071465 95.741402045 126.300027255 ZT12-15 131.98057527499998 116.8061798 147.15497075 ZT16-19 166.2622639 162.73945095 169.78507685000002 ZT20-23 145.261073 139.20940195 151.31274405000002