condition mean min max ZT0-3 101.067891 101.067891 101.067891 ZT4-7 282.0527555 282.0527555 282.0527555 ZT8-11 269.2607085 269.2607085 269.2607085 ZT12-15 216.4764275 216.4764275 216.4764275 ZT16-19 182.735299 182.735299 182.735299 ZT20-23 176.008151 176.008151 176.008151