condition mean min max ZT0-3 92.440625 91.41855 93.4627 ZT4-7 96.7157 96.7157 96.7157 ZT8-11 85.21575 85.21575 85.21575 ZT12-15 0 0 0 ZT16-19 75.611 75.611 75.611 ZT20-23 74.64215 74.64215 74.64215