Construct a confidence interval calculator without standard deviation?

If you have a variable that follows a normal distribution, then you can use the standard deviation to create a 95% confidence interval. If you want to find a confidence interval for a population mean for which you have data (and it looks like it is normally distributed), you can use a calculator.

You might have already seen one of these, but did you know that you can also use these calculators without the standard deviation? The calculator also works for z-scores, which is a common way

Construct a confidence interval calculator without mean?

If you want to be able to construct a confidence interval calculator without the use of the population standard deviation, you will need to estimate it. If you want to use an estimate and not the actual population standard deviation for your confidence interval, use the sample standard deviation instead.

Construct confidence interval calculator without standard error?

Another option for constructing a confidence interval calculator is to use the point estimate along with the lower and upper confidence limits instead of the standard error. The lower and upper confidence limits are each calculated based on an assumption that the population mean is equal to the sample mean.

Construct a confidence interval calculator without variance?

If you need to build a confidence interval calculator without the standard error of the mean, you can do it! The variance of the mean is the square of the standard error of the mean. So, to calculate a confidence interval without variance, you can find the standard error of the mean using the sample variance divided by the square root of the sample size and then use that value to find a confidence interval. Note that this is not the same thing as the standard error of the mean.

Construct a confidence interval calculator without mean and standard deviation?

The most common way to calculate a confidence interval is to use a sample mean and a sample standard deviation for the population mean. However, it is possible to calculate a confidence interval without using the sample mean and standard deviation. Instead, you can use a sample percentile and a sample Z-score.