condition mean min max ZT0-3 9.49727 7.21569 11.77885 ZT4-7 5.86207 5.86207 5.86207 ZT8-11 5.86247 5.86247 5.86247 ZT12-15 0 0 0 ZT16-19 6.799455 6.799455 6.799455 ZT20-23 10.84221 10.84221 10.84221