The western blot assay is a blood test for the presence of hiv. It has been found that this test sometimes gives false positive results for hiv. A medical researcher claims that the rate of false positives is 2%. A recent study of 400 randomly selected US blood donors who do not have hiv found that 2.5% received a false positive result. At a= 0.05 is there enough evidence to reject the researchers claim?

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.1: Measures Of Center
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The western blot assay is a blood test for the presence of hiv. It has been found that this test sometimes gives false positive results for hiv. A medical researcher claims that the rate of false positives is 2%. A recent study of 400 randomly selected US blood donors who do not have hiv found that 2.5% received a false positive result. At a= 0.05 is there enough evidence to reject the researchers claim?

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