condition mean min max ZT0-3 1.4982600000000001 1.37527 1.62125 ZT4-7 1.307215 1.307215 1.307215 ZT8-11 1.4004850000000002 1.4004850000000002 1.4004850000000002 ZT12-15 0 0 0 ZT16-19 1.1068 1.1068 1.1068 ZT20-23 1.956445 1.956445 1.956445