condition mean min max ZT0-3 23.9133003775 18.424010115 29.40259064 ZT4-7 11.5699430725 10.84786226 12.292023884999999 ZT8-11 10.514072653749999 9.984687824 11.0434574835 ZT12-15 11.066069927000001 9.621239201000002 12.510900653 ZT16-19 24.1308814425 23.773542565 24.488220320000003 ZT20-23 33.9192802575 27.143731564999996 40.69482895