condition mean min max ZT0-3 3.4000424999999996 2.65835 4.141735 ZT4-7 4.562455 4.562455 4.562455 ZT8-11 2.2622850000000003 2.2622850000000003 2.2622850000000003 ZT12-15 0 0 0 ZT16-19 3.44012 3.44012 3.44012 ZT20-23 9.38269 9.38269 9.38269