condition mean min max ZT0-3 97.169643 97.169643 97.169643 ZT4-7 83.428769 83.428769 83.428769 ZT8-11 96.07281800000001 96.07281800000001 96.07281800000001 ZT12-15 109.445302 109.445302 109.445302 ZT16-19 123.378176 123.378176 123.378176 ZT20-23 115.131477 115.131477 115.131477