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Use this calculator to compute the confidence interval or margin of error, assuming the sample mean most likely follows a normal distribution. Use the Standard Deviation Calculator if you have raw data only. Sample size (amount), n. Sample Mean (average), X̄. Standard Deviation, σ or s.
Our 95% confidence interval calculator will help you calculate this confidence interval and provide you with the essential knowledge! Read on to learn: What is the 95% confidence interval formula; What is the interpretation of the 95% confidence interval (or any chosen one, to be honest); and; What is the p-value for the 95 percent confidence ...
Decide on your confidence level. Let's assume it is 95%. Calculate what is the probability that your result won't be in the confidence interval. This value is equal to 100%–95% = 5%. Take a look at the normal distribution curve. 95% is the area in the middle.
Powerful confidence interval calculator online: calculate two-sided confidence intervals for a single group or for the difference of two groups. One sample and two sample confidence interval calculator with CIs for difference of proportions and difference of means.
Confidence Interval Calculator. Computes the mean confidence interval and the standard deviation confidence interval using the confidence level and raw data or sample statistics. Both R code and online calculations with charts are available.
Enter the confidence level, sample size, sample mean, and standard deviation to find the confidence interval using the calculator below.
Enter how many in the sample, the mean and standard deviation, choose a confidence level, and the calculation is done live. Read Confidence Intervals to learn more.
The most commonly used confidence level is 95% while 90% and 99% are also popular. An interval estimate constructed at a confidence level of 95% is called a 95% confidence interval. To change the confidence level, click on $\boxed{95\%}$.
Calculate confidence interval of your data with our confidence interval calculator. Input sample size, mean, standard deviation & confidence level to get result
An easy confidence interval calculator for estimating a population mean from a single sample. Provides full details of workings.