condition mean min max ZT0-3 7.93635548675 7.7721136125 8.100597361 ZT4-7 10.066492314833333 9.398446827666666 10.734537802 ZT8-11 8.942313644666667 8.581033555000001 9.303593734333333 ZT12-15 10.747560839666667 10.573230229333333 10.92189145 ZT16-19 10.327538899 9.839212505999999 10.815865292 ZT20-23 9.701648826 9.566694446 9.836603206