condition mean min max ZT0-3 401.6 401.6 401.6 ZT4-7 384.5 384.5 384.5 ZT8-11 360.79999999999995 360.79999999999995 360.79999999999995 ZT12-15 471.25 471.25 471.25 ZT16-19 497.5 497.5 497.5 ZT20-23 522.45 522.45 522.45