condition mean min max ZT0-3 5907.616672 5907.616672 5907.616672 ZT4-7 5902.014128 5902.014128 5902.014128 ZT8-11 4292.521135 4292.521135 4292.521135 ZT12-15 5344.549881999999 5344.549881999999 5344.549881999999 ZT16-19 4422.464475 4422.464475 4422.464475 ZT20-23 3290.2339775 3290.2339775 3290.2339775