An important feature of digital cameras is battery life, the number of shots that can be taken before the battery needs to be recharged. The file Cameras contains the battery life of 11 subcompact cameras and 7 compact cameras. (Data extracted from "Cameras," Consumer Reports, July 2012, pp. 42-44.)
a. Is there evidence of a difference in the median battery life between subcompact cameras and compact cameras? (Use a = 0.05.)
b. What assumptions must you make in (a)?
c. Compare the results of (a) with those of Problem 10.11 (a) on page 354. Discuss.