Researchers Holdgate et al. (2016) studied walking behavior of elephants in North American zoos to see whether there is a difference in average distance traveled by African and Asian elephants. They put GPS loggers on 33 African elephants and 23 Asian elephants and measured the distance (in kilometers) the elephants walked per day. The data file Elephants contains results that are consistent with what the researchers found. 

a. Identify the explanatory and response variable and classify each as categorical or quantitative. 

b. Is this an observational study or a randomized experiment? Explain. 

c. State the hypotheses either in words or using appropriate symbols. 

d. Put the data in the Multiple Means applet and give the two sample means. 

e. Find an approximate p-value. Based on your p-value, do you have strong evidence that captive African and Asian elephants walk different distances, on average, per day?