how to calculate confidence interval for a standard error how does the 95th centile determine the confidence interval in math convert rate to confidence interval how to find the confidence interval calculate confidence interval using standard error how is the confidence interval calculated calculate the confidence intervals how to find confidence intervals in a test how to calculate a confidence interval how to calculate confidence interval how do you get confidence interval how to calculate the ib of confidence interval calculate the confidence interval how to calculate a confidence interval average confidence interval what is confidence interval when to figure the confidence interval how much is the confidence interval of 95% how to calculate 95% confidence interval how to calculate 95% confidence interval