condition mean min max ZT0-3 2340.270518 2340.270518 2340.270518 ZT4-7 2615.466362 2615.466362 2615.466362 ZT8-11 2426.3653185000003 2426.3653185000003 2426.3653185000003 ZT12-15 2312.346358 2312.346358 2312.346358 ZT16-19 1980.4223940000002 1980.4223940000002 1980.4223940000002 ZT20-23 1930.2305015000002 1930.2305015000002 1930.2305015000002