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A study by a medical researcher of HIV infection rates among injection drug users reported that the rate of new infections steadily dropped over the
A study by a medical researcher of HIV infection rates among injection drug users reported that the rate of new infections steadily dropped over the last couple of decades. The latest report was that 2% of IV drug users are HIV positive. A drug counselor believes that the percentage of IV drug users in his city who are HIV positive is more than 2%. The counselor surveys a simple random sample of 415 drug users in the city and finds that 8 are HIV positive. Does this evidence support the counselor's belief? Use a 0.01 level of significance.
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