condition mean min max ZT0-3 73.632792 73.632792 73.632792 ZT4-7 70.89998349999999 70.89998349999999 70.89998349999999 ZT8-11 54.963781999999995 54.963781999999995 54.963781999999995 ZT12-15 57.106483 57.106483 57.106483 ZT16-19 77.8352935 77.8352935 77.8352935 ZT20-23 93.121261 93.121261 93.121261