condition mean min max ZT0-3 201.593 201.593 201.593 ZT4-7 215.6565 215.6565 215.6565 ZT8-11 169.81 169.81 169.81 ZT12-15 156.2665 156.2665 156.2665 ZT16-19 145.00400000000002 145.00400000000002 145.00400000000002 ZT20-23 206.2335 206.2335 206.2335