condition mean min max ZT0-3 4.88178494125 4.7009156825 5.0626542 ZT4-7 4.39974943975 3.9758817745 4.823617105 ZT8-11 4.141832099 3.9414655615000003 4.3421986365 ZT12-15 4.51881221 3.9613602825000003 5.0762641375 ZT16-19 6.819282782 5.080472383 8.558093181 ZT20-23 15.118160204999999 14.175798835 16.060521575