condition mean min max ZT0-3 97.265501 97.265501 97.265501 ZT4-7 79.99508349999999 79.99508349999999 79.99508349999999 ZT8-11 83.964924 83.964924 83.964924 ZT12-15 92.3879685 92.3879685 92.3879685 ZT16-19 90.488808 90.488808 90.488808 ZT20-23 76.9235095 76.9235095 76.9235095