condition mean min max ZT0-3 44.905453574999996 34.94132464 54.86958251 ZT4-7 21.33840098325 13.752523216499998 28.924278750000003 ZT8-11 14.052780392750002 8.353422983 19.752137802500002 ZT12-15 26.88370724 23.962557949999997 29.80485653 ZT16-19 24.698019582500002 22.566096090000002 26.829943075000003 ZT20-23 30.125638495 29.7385553 30.51272169