The figure below examines the association between life expectancy and computer ownership for several countries.Also shown are the equation and R² value from a linear regression analysis.What is the best conclusion to draw from the figure? A)Exposure to the radiation from computer monitors is causing a clear decline in life expectancy. B)Persons who live longer buy more computers over the course of their longer lifetimes. C)Although the association is strong,computer ownership probably does not promote longevity.Instead,national per capita wealth is probably a lurking variable that drives both life expectancy and computer ownership. D)Computer ownership promotes health and long life,probably due to the greater access that computer owners have to health information on the world-wide web. E)Clearly,there must be some as-yet unknown health benefit associated with using computers.

Question

Quizplus · Accepted Answer

The figure shows a strong association between life expectancy and computer ownership, but it is not clear that computer ownership is causing an increase in life expectancy. There could be a lurking variable, such as national per capita wealth, that drives both life expectancy and computer ownership. Therefore, the best conclusion is that although the association is strong, computer ownership probably does not promote longevity.

The Figure Below Examines the Association Between Life Expectancy and Computer