in october 1947 the gallup organization surveyed 1000 adult americans and asked are you a total abstainer from or do you occasionally consume alcoholic beverages? of the 1000 adults survey 378 indicated that they were total abstainers. in a recent survey the same question was asked of 1000 americans and 333 indicated that they were total abstainers. has the proportion of adult americans who totally abstain from alcohol changed? use the 0.05 level of significance to find the test statistic.

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