condition mean min max ZT0-3 480.9 480.9 480.9 ZT4-7 373.5 373.5 373.5 ZT8-11 430.9 430.9 430.9 ZT12-15 391.4 391.4 391.4 ZT16-19 394.8 394.8 394.8 ZT20-23 589.25 589.25 589.25