condition mean min max ZT0-3 9.801535000000001 9.14317 10.459900000000001 ZT4-7 6.11389 6.11389 6.11389 ZT8-11 5.67803 5.67803 5.67803 ZT12-15 0 0 0 ZT16-19 9.08596 9.08596 9.08596 ZT20-23 9.485389999999999 9.485389999999999 9.485389999999999