condition mean min max ZT0-3 1673.3366666666668 1299.52 2078.76 ZT4-7 1952.935 1952.935 1952.935 ZT8-11 1823.2 1823.2 1823.2 ZT12-15 1353.3899999999999 1307.0 1399.78 ZT16-19 1329.32 1329.32 1329.32 ZT20-23 1025.644 1025.644 1025.644