condition mean min max ZT0-3 944.851505 944.851505 944.851505 ZT4-7 1707.7810255 1707.7810255 1707.7810255 ZT8-11 2553.6861145000003 2553.6861145000003 2553.6861145000003 ZT12-15 1726.979591 1726.979591 1726.979591 ZT16-19 1289.3719425 1289.3719425 1289.3719425 ZT20-23 803.458488 803.458488 803.458488