condition mean min max ZT0-3 74.000805 74.000805 74.000805 ZT4-7 55.049242 55.049242 55.049242 ZT8-11 53.012606 53.012606 53.012606 ZT12-15 62.71103000000001 62.71103000000001 62.71103000000001 ZT16-19 60.450395 60.450395 60.450395 ZT20-23 51.4495725 51.4495725 51.4495725