condition mean min max ZT0-3 23.49625 23.49625 23.49625 ZT4-7 16.258499999999998 16.258499999999998 16.258499999999998 ZT8-11 25.15775 25.15775 25.15775 ZT12-15 19.3357 19.3357 19.3357 ZT16-19 32.80565 32.80565 32.80565 ZT20-23 28.073900000000002 28.073900000000002 28.073900000000002