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a medical researcher says That list than 80% of adults in a certain country think that...

a medical researcher says That list than 80% of adults in a certain country think that healthy children should be required to be vaccinated in a random sample of 300 and not in that country 77% think that healthy children should be required to be vaccinated at a= 0.01 is there enough evidence to support the researchers claim find the standardized test statistic Z
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