condition mean min max ZT0-3 10.85625 10.85625 10.85625 ZT4-7 11.1203 11.1203 11.1203 ZT8-11 11.89895 11.89895 11.89895 ZT12-15 10.738555000000002 10.738555000000002 10.738555000000002 ZT16-19 9.834769999999999 9.834769999999999 9.834769999999999 ZT20-23 8.623809999999999 8.623809999999999 8.623809999999999