condition mean min max ZT0-3 468.8 468.8 468.8 ZT4-7 609.9 609.9 609.9 ZT8-11 589.0999999999999 589.0999999999999 589.0999999999999 ZT12-15 564.5999999999999 564.5999999999999 564.5999999999999 ZT16-19 512.5 512.5 512.5 ZT20-23 438.5 438.5 438.5