condition mean min max ZT0-3 24.8653 24.8653 24.8653 ZT4-7 19.8623 19.8623 19.8623 ZT8-11 16.3412 16.3412 16.3412 ZT12-15 18.5572 18.5572 18.5572 ZT16-19 28.38395 28.38395 28.38395 ZT20-23 28.6993 28.6993 28.6993