condition mean min max ZT0-3 71.631801 71.631801 71.631801 ZT4-7 64.93787950000001 64.93787950000001 64.93787950000001 ZT8-11 91.361835 91.361835 91.361835 ZT12-15 93.06254799999999 93.06254799999999 93.06254799999999 ZT16-19 89.131254 89.131254 89.131254 ZT20-23 100.80908550000001 100.80908550000001 100.80908550000001