condition mean min max ZT0-3 2229.6499999999996 2229.6499999999996 2229.6499999999996 ZT4-7 2296.2 2296.2 2296.2 ZT8-11 2622.4 2622.4 2622.4 ZT12-15 2585.6000000000004 2585.6000000000004 2585.6000000000004 ZT16-19 2883.55 2883.55 2883.55 ZT20-23 2541.25 2541.25 2541.25