condition mean min max ZT0-3 9.935793483000001 9.229599196 10.64198777 ZT4-7 8.196104887499999 7.633062636 8.759147139 ZT8-11 14.146663744 11.143663457999999 17.14966403 ZT12-15 10.76842840925 9.808313863 11.7285429555 ZT16-19 11.3614498495 10.818999634 11.903900064999998 ZT20-23 13.1792922675 12.876098575 13.48248596