condition mean min max ZT0-3 0.078363 0.0782405 0.0784855 ZT4-7 0.31672999999999996 0.31672999999999996 0.31672999999999996 ZT8-11 0.412415 0.412415 0.412415 ZT12-15 0 0 0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0