needing help with 2 and three. thank you!
Coronavirus Confidence intervals Morning Consult recently surveyed 1986 randomly selected registered voters between the dates of March 13-16, 2020 and asked them several questions. You can find the entire report here. For this exercise, we will focus on one question that was asked in the survey, "How concerned are you that the coronavirus will impact the U.S. economy?" 1. Of the 1986 voters that were surveyed, 1090 of them were "very concerned" about the U.S. Economy. a. Use a bootstrap distribution with at least 3000 samples in Statkey to find a 90% confidence interval for the true proportion of all registered voters that are very concerned about the economy. Copy your bootstrap distribution showing your confidence interval into this problem. b. Interpret the confidence interval you found in terms of the original survey. c. What is the standard error from your bootstrap distribution: 1090 1986 2. Using the theoretical normal distribution in Statkev, edit your parameters. Let the mean bep 0.549 and let the standard deviation be the standard error you found in part c of problem 1. Find a 90% confidence interval with the edited parameters. Copy your theoretical distribution showing the interval into this problem. b. How does this interval compare to the one you found in question 1. a. 3. Using the theoretical normal distribution in Statkey keep the parameters as mean = 0 and standard deviation = 1. a. Find the z* associated with a 90% confidence interval. Copy your theoretical distribution showing your results into this problem. b. Use the standard error from question 1 and your z* to calculate a 90% confidence interval using the formula: statistic z*.SE How does this interval compare to the other intervals you have found. Coronavirus Confidence intervals Morning Consult recently surveyed 1986 randomly selected registered voters between the dates of March 13-16, 2020 and asked them several questions. You can find the entire report here. For this exercise, we will focus on one question that was asked in the survey, "How concerned are you that the coronavirus will impact the U.S. economy?" 1. Of the 1986 voters that were surveyed, 1090 of them were "very concerned" about the U.S. Economy. a. Use a bootstrap distribution with at least 3000 samples in Statkey to find a 90% confidence interval for the true proportion of all registered voters that are very concerned about the economy. Copy your bootstrap distribution showing your confidence interval into this problem. b. Interpret the confidence interval you found in terms of the original survey. c. What is the standard error from your bootstrap distribution: 1090 1986 2. Using the theoretical normal distribution in Statkev, edit your parameters. Let the mean bep 0.549 and let the standard deviation be the standard error you found in part c of problem 1. Find a 90% confidence interval with the edited parameters. Copy your theoretical distribution showing the interval into this problem. b. How does this interval compare to the one you found in question 1. a. 3. Using the theoretical normal distribution in Statkey keep the parameters as mean = 0 and standard deviation = 1. a. Find the z* associated with a 90% confidence interval. Copy your theoretical distribution showing your results into this problem. b. Use the standard error from question 1 and your z* to calculate a 90% confidence interval using the formula: statistic z*.SE How does this interval compare to the other intervals you have found
