o points A September 2020 survey found that 61% of Americans support abolishing the Electoral College. How many Americans should be included in a sample if we want to estimate the proportion of Americans who support abolishing the Electoral College today within 2% with 90% confidence? QUESTION 6 10 points A sample of 51 COVID-19 patients had a mean incubation time of 6.7 days, and a standard deviation of 4.0 days. Find and interpret a 90% confidence interval for the mean incubation time for COVID-19. Round your final answer to one decimal place. We are 90% confident the incubation time is between days and days. QUESTION 7 10 points A random sample of 169 New Englanders revealed that 154 wear a mask when they are indoors and not in their home. Find and interpret a 95% confidence interval for the proportion of New Englanders who wear a mask. Round your final answer to 2 decimal places. We are 95% confident the proportion of New Englanders that wear a mask is between % and %. QUESTION 8 22 points Tik Tok users spend an average of 55 minutes per day using the app. A researcher believes the time spend is less among teenager users. A random sample of 61 TikTok teenager users resulted in a sample mean daily use of 50 minutes, and a sample standard deviation of 12.5 minutes. Is there enough evidence to support the researcher's claim? Use a level of significance of 5%. The null hypothesis is: The alternative hypothesis is