How do you find the margin error for a 90% confidence level with n = 480, x = 130? Statistics Statistical Inference Overview Confidence Intervals 1 Answer VSH Mar 14, 2018 #E = 0.0334# Explanation: Answer link Related questions What does a 95% confidence interval versus a 99% confidence interval tell you? Why is a 90% confidence interval narrower than a 95% confidence interval? What happens to the confidence interval if you increase the confidence level? If a data set of n=115 has a mean of 9.74 and a population standard deviation of 2.93, what is... How do confidence intervals change with standard deviations? What does the confidence interval of a sample tell you? How do confidence intervals change with sample size? What is the difference between the confidence interval and margin of error? How does confidence interval change with sample size? What does a 95% versus a 99% confidence interval mean for a given estimate? See all questions in Confidence Intervals Impact of this question 14785 views around the world You can reuse this answer Creative Commons License