condition mean min max ZT0-3 1.9708375 1.794105 2.14757 ZT4-7 1.371195 1.371195 1.371195 ZT8-11 1.026323 1.026323 1.026323 ZT12-15 0 0 0 ZT16-19 1.91794 1.91794 1.91794 ZT20-23 2.199735 2.199735 2.199735