condition mean min max ZT0-3 1307.441399 1307.441399 1307.441399 ZT4-7 1678.853779 1678.853779 1678.853779 ZT8-11 1493.139405 1493.139405 1493.139405 ZT12-15 1684.84932 1684.84932 1684.84932 ZT16-19 1344.8975925 1344.8975925 1344.8975925 ZT20-23 1353.7738075 1353.7738075 1353.7738075