condition mean min max ZT0-3 16.782525 16.57125 16.9938 ZT4-7 8.431754999999999 8.431754999999999 8.431754999999999 ZT8-11 5.349365000000001 5.349365000000001 5.349365000000001 ZT12-15 0 0 0 ZT16-19 23.521549999999998 23.521549999999998 23.521549999999998 ZT20-23 22.52 22.52 22.52