condition mean min max ZT0-3 332.6 332.6 332.6 ZT4-7 329.1 329.1 329.1 ZT8-11 338.45000000000005 338.45000000000005 338.45000000000005 ZT12-15 396.55 396.55 396.55 ZT16-19 544.7 544.7 544.7 ZT20-23 344.79999999999995 344.79999999999995 344.79999999999995