condition mean min max ZT0-3 39.742672 39.742672 39.742672 ZT4-7 44.0625095 44.0625095 44.0625095 ZT8-11 46.9327885 46.9327885 46.9327885 ZT12-15 48.712396999999996 48.712396999999996 48.712396999999996 ZT16-19 52.9616295 52.9616295 52.9616295 ZT20-23 48.171159 48.171159 48.171159