As the Arctic warms and winters become shorter, hibernation patterns of arctic mammals are expected to change. Sheriff et al. (2011) investigated emergence dates from hibernation of arctic ground squirrels at sites in the Brooks Range of northern Alaska. The measurements shown in the following figure are emergence dates in a sample of male and female ground squirrels at one of their study sites.

a. What type of graph is this?

b. Which sex, males or females, has the earliest median emergence date? Explain how you obtained your answer.

c. Which sex, male or female, has the greater interquartile range in emergence date? Explain how you obtained your answer.

Transcribed Image Text:

Cumulative relative frequency 1.0 0.8 0.6 0.4 0.2- 0.0 26 Females March 31 5 Males 10 15 20 25 30 April Date of emergence