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1. In a given city, a sample of 1000 individuals was interviewed. In the sample, 648 indicated
that they regularly wore protective masks while in public during the COVID-19 pandemic. Give
the 95% confidence interval for the proportion of people in the city who regularly wore
protective masks.
2. A researcher tests the hypotheses H0 : p = 0.10 and Ha : p 0.10 with = 0.05. The sample
proportion from a random sample of 500 is 0.11. Is there sufficient evidence to reject the null
hypothesis?

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1- In a given city- a sample of 1000 individuals was interviewed- In t.docx

  • 1. 1. In a given city, a sample of 1000 individuals was interviewed. In the sample, 648 indicated that they regularly wore protective masks while in public during the COVID-19 pandemic. Give the 95% confidence interval for the proportion of people in the city who regularly wore protective masks. 2. A researcher tests the hypotheses H0 : p = 0.10 and Ha : p 0.10 with = 0.05. The sample proportion from a random sample of 500 is 0.11. Is there sufficient evidence to reject the null hypothesis?