Suppose that a cell phone manufacturer claims that, on average, its cell phones last 7 years. If its cell phones do, in fact, last an average of 7 years,
what would be the expected mean amount of time a sample of the company's
cell phones would last?
A. 2 years
B. 9 years
Ο Ο
C. 7 years
0
D. 3.5 years