condition mean min max ZT0-3 1.044106 0.957832 1.13038 ZT4-7 1.54148 1.54148 1.54148 ZT8-11 1.5315400000000001 1.5315400000000001 1.5315400000000001 ZT12-15 0 0 0 ZT16-19 3.013335 3.013335 3.013335 ZT20-23 2.46048 2.46048 2.46048