The following excerpts are from an article titled “Public Takes Conservation Tur

Question

The following excerpts are from an article titled “Public Takes Conservation Turn on Gun Control, Abortion,” published April 30, 2009 in pewresarch.org by the Pew Research Center for the People and the Press.

Which excerpt does NOT describe a comparison that is appropriate for testing a hypothesis about the difference in two population proportions?

A) “For the first time in a Pew Research survey, nearly as many people believe it is more important to protect the right of Americans to own guns (45%) than to control gun ownership (49%).”

B) “Overall, a third of Americans -- including 42% of men and 25% of women -- say they have a gun, rifle or pistol in their home.”

C) “The change has been less pronounced among white non-Hispanic Catholics: In August, 51% said that abortion should be legal in most cases; in both October surveys, 55% favored legal abortion.”

Explanation / Answer

(A) This excerpt entails the comparison between two proportion :(1) to protect the right of Americans to own guns (2) To control gun ownership.

(B Here there is no comparison between any groups. There is single proportion that one third of Americans have firearm. The data about men and women is given only but no comparison is proposed.

(C) Here there is comparison between two groups. Where August and October survey are compared. So, this excerpt compares two proportions.

So, only option B is correct here where no two proportions are compared.

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