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? .