Hypothesis Tests for Population Proportions. For Exercises 10–21, use a 0.05 significance level to conduct a hypothesis test with the four-step procedure described in the text. Be sure to state your conclusion.
13. Cyber Security. Based on information from the National Cyber Security Alliance, 93% of computer owners believe that they have antivirus programs installed on their computers. In a random sample of 400 scanned computers, it is found that 380 of them (or 95%) actually have antivirus programs. Use the sample data from the scanned computers to test the claim that 93% of computers have antivirus programs.
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