condition mean min max ZT0-3 42.2692972425 36.974088465 47.56450602 ZT4-7 73.11240198 68.76259662333334 77.46220733666667 ZT8-11 87.51982083666667 86.32663027333334 88.7130114 ZT12-15 89.30033408666667 78.05390281999999 100.54676535333334 ZT16-19 99.20792180833334 94.38181681 104.03402680666667 ZT20-23 86.35227688999998 85.00859879666666 87.69595498333332