13 of 15 Chronic wasting disease is a fatal disease of deer and elk believed to be caused by transmissible prions. The origin, development, and spread of chronic wasting disease in free-ranging deer and elk populations are not well understood. One factor directly related to the control of chronic wasting disease is the incubation period in free-ranging animals. Box plots are shown for estimates of the incubation period of chronic wasting disease in North American deer and elk between 201 1 and 2016. Incubation period of chronic wasting disease in North American deer and elk 70 60 50 Incubation period (in months) 40 30 20 10 - 2011 2012 2013 2014 2015 2016 Year Select the year with a median of 35 months and an interquartile range of approximately 8 months for the incubation period20 - 10 - 2011 2012 2013 2014 . 2015 2016 Year Select the year with a median of 35 months and an interquartile range of approximately 8 months for the incubation period of chronic wasting disease. 2011 2012 O 2013 2014 2015 2016 MacBook Air 888 DO DII DD FA F5 F6 F7 F10 F11 F12 & 6 7 8 9 O delete