condition mean min max ZT0-3 0.0283410535 0.0 0.056682107 ZT4-7 0.08514764949999999 0.0 0.17029529899999998 ZT8-11 4.3918892715 1.4861055595000001 7.2976729835 ZT12-15 48.25351279224999 37.891812889499995 58.615212695 ZT16-19 59.79052581 54.181306934999995 65.399744685 ZT20-23 46.1278334 43.639532450000004 48.61613435