# TMean2Estimate Command

From GeoGebra Manual

- TMean2Estimate( <List of Sample Data 1>, <List of Sample Data 2>, <Level>, <Boolean Pooled> )
- Calculates a t confidence interval estimate of the difference between two population means using the given sample data sets and confidence
*Level*. - If
*Pooled*= true, then population variances are assumed equal and sample standard deviations are combined in calculation. - If
*Pooled*= false, then population variances are not assumed equal and sample standard deviations are not combined. - Results are returned in list form as
*{lower confidence limit, upper confidence limit}*.

- TMean2Estimate( <Sample Mean 1>, <Sample Standard Deviation 1>, <Sample Size 1>, <Sample Mean 2>, <Sample Standard Deviation 2>, <Sample Size 2>, <Level>, <Boolean Pooled> )
- Calculates a t confidence interval estimate of the difference between two population means using the given sample statistics and confidence
*Level*.*Pooled*is defined as above. Results are returned in list form as*{lower confidence limit, upper confidence limit}*.