condition mean min max ZT0-3 1146.3299999 1146.3299999 1146.3299999 ZT4-7 894.9822221 894.9822221 894.9822221 ZT8-11 424.5538888666667 424.5538888666667 424.5538888666667 ZT12-15 519.5955555333334 519.5955555333334 519.5955555333334 ZT16-19 845.3088889 845.3088889 845.3088889 ZT20-23 1000.907778 1000.907778 1000.907778