condition mean min max ZT0-3 1.18271 0.995955 1.369465 ZT4-7 1.8642349999999999 1.8642349999999999 1.8642349999999999 ZT8-11 0.959022 0.959022 0.959022 ZT12-15 0 0 0 ZT16-19 1.874025 1.874025 1.874025 ZT20-23 2.43961 2.43961 2.43961