condition mean min max ZT0-3 214.7545 200.835 228.674 ZT4-7 66.1722 66.1722 66.1722 ZT8-11 30.3402 30.3402 30.3402 ZT12-15 0 0 0 ZT16-19 123.33995000000002 123.33995000000002 123.33995000000002 ZT20-23 114.20400000000001 114.20400000000001 114.20400000000001