condition mean min max ZT0-3 12.020128333333334 11.651485000000001 12.55965 ZT4-7 7.923275 7.923275 7.923275 ZT8-11 10.55169 10.55169 10.55169 ZT12-15 9.925767500000001 9.91028 9.941255000000002 ZT16-19 9.50422 9.50422 9.50422 ZT20-23 13.18245 13.18245 13.18245