condition mean min max ZT0-3 9.852084 9.852084 9.852084 ZT4-7 10.5797665 10.5797665 10.5797665 ZT8-11 11.057698 11.057698 11.057698 ZT12-15 9.856170500000001 9.856170500000001 9.856170500000001 ZT16-19 11.027172 11.027172 11.027172 ZT20-23 10.729328500000001 10.729328500000001 10.729328500000001