condition mean min max ZT0-3 10.29681 10.00637 10.587250000000001 ZT4-7 8.47192 8.47192 8.47192 ZT8-11 5.997565 5.997565 5.997565 ZT12-15 0 0 0 ZT16-19 15.132000000000001 15.132000000000001 15.132000000000001 ZT20-23 11.456710000000001 11.456710000000001 11.456710000000001