condition mean min max ZT0-3 440.75 440.75 440.75 ZT4-7 348.7 348.7 348.7 ZT8-11 318.25 318.25 318.25 ZT12-15 405.79999999999995 405.79999999999995 405.79999999999995 ZT16-19 493.6 493.6 493.6 ZT20-23 597.0 597.0 597.0