condition mean min max ZT0-3 60.27 60.27 60.27 ZT4-7 70.43722222 70.43722222 70.43722222 ZT8-11 62.295 62.295 62.295 ZT12-15 43.25222222 43.25222222 43.25222222 ZT16-19 52.02111111 52.02111111 52.02111111 ZT20-23 63.48777778 63.48777778 63.48777778