condition mean min max ZT0-3 433.436942 433.436942 433.436942 ZT4-7 410.598724 410.598724 410.598724 ZT8-11 447.50403900000003 447.50403900000003 447.50403900000003 ZT12-15 425.3810575 425.3810575 425.3810575 ZT16-19 700.529351 700.529351 700.529351 ZT20-23 690.7874159999999 690.7874159999999 690.7874159999999