Enter the sample number, the sample mean, and standard deviation to calculate the confidence interval. You can also calculate a confidence interval for the mean of just a single group. height, weight, speed, time, revenue, etc. Confidence Interval Calculator Enter how many in the sample, the mean and standard deviation, choose a confidence level, and the calculation is done live. This confidence interval calculator allows you to perform a post-hoc statistical evaluation of a set of data when the outcome of interest is the absolute difference of two proportions (binomial data, e.g. Confidence Interval Calculator Use this calculator to compute the confidence interval or margin of error assuming the sample mean most likely follows a normal distribution. When it comes to the best calculation option, using a confidence interval calculator is the finest alternative. The value of this parameter is unknown. ), or the relative difference between two proportions or two means. Read Confidence Intervals to learn more. conversion rate or event rate) or the absolute difference of two means (continuous data, e.g. What is the confidence interval? A simple definition of the confidence interval is a range of values that has the inclusion of a population parameter. Confidence Interval Calculator (1 or 2 means) Calculate the confidence interval of a sample set. It uses the Z-distribution (normal dist… Use the Standard Deviation Calculator if you have raw data only.