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In an attitude test, 55 out of 120 persons of Community 1 and 115 persons out...

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Basic Math

In an attitude test, 55 out of 120 persons ofCommunity 1 and 115 persons out of 400 of Community 2 answered“Yes” to a certain question. Do these two communities differfundamentally in their attitudes on this question?

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Let denote the proportion of people who answered Yes    See Answer
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