condition mean min max ZT0-3 244.83775 234.2115 255.464 ZT4-7 718.809 718.809 718.809 ZT8-11 407.1145 407.1145 407.1145 ZT12-15 0 0 0 ZT16-19 21.7693 21.7693 21.7693 ZT20-23 91.29415 91.29415 91.29415