condition mean min max ZT0-3 64.417686 64.417686 64.417686 ZT4-7 95.9031885 95.9031885 95.9031885 ZT8-11 109.935663 109.935663 109.935663 ZT12-15 89.3885775 89.3885775 89.3885775 ZT16-19 94.232351 94.232351 94.232351 ZT20-23 102.247905 102.247905 102.247905