condition mean min max ZT0-3 3942.0499999999997 3942.0499999999997 3942.0499999999997 ZT4-7 4891.4 4891.4 4891.4 ZT8-11 4933.700000000001 4933.700000000001 4933.700000000001 ZT12-15 5100.25 5100.25 5100.25 ZT16-19 5066.5 5066.5 5066.5 ZT20-23 4259.25 4259.25 4259.25