condition mean min max ZT0-3 82.23190672 76.49922309 87.96459035 ZT4-7 86.07281772333333 84.25401050333333 87.89162494333333 ZT8-11 91.74134375 90.53546427 92.94722322999999 ZT12-15 83.36132660499999 82.41354745 84.30910576 ZT16-19 79.37048357666666 78.54042756 80.20053959333333 ZT20-23 73.83626499666667 73.63395068333332 74.03857931