For example, a healthcare consultant wants to compare the patient satisfaction ratings of two hospitals. If the means from the two hospitals are different, the consultant uses the confidence interval to determine whether the difference is practically significant.
To perform a 2-sample t-test, choose.
If you have paired or dependent data, such as measurements of a bearing taken with two different calipers, use Paired t instead. For more information, go to How are dependent and independent samples different?.