Reviewing historical data, medical researchers in California found that counties with the largest number of television sets per capita have had the lowest incidence of a serious brain disease, mosquito-borne encephalitis. The researchers have concluded that people in these counties stay indoors more and thus avoid exposure to the disease.
The researchers’ conclusion would be most strengthened if which of the following were true?

Question

Examsnet · Accepted Answer

Correct Answer is :  The more television sets there are per capita in a county, the more time the average county resident spends watching television.

GMAT Verbal Reasoning Practice Test 3