Since this is a parametric test, an **error plot** is an appropriate presentation of the data. It shows the mean and variance of the samples being compared and is a clear way of demonstrating the degree of overlap between samples.

*Figure 1. Examples of error plots comparing two samples with differing degrees of overlap*

A **box plot** would also be a suitable way to present the data, and is used in the example used in the report.

*Figure 2. Example box plot of data from the example study. Sample 14 (ewe 945) is shown as an outlier*

As part of the check that data satisfy the parametric criteria, it may be appropriate to plot out the data for each sample as a **histogram** to assess the closeness of the distribution to a normal distribution. This would not apply to small samples.

*Figure 3. Example histogram for the difference data from the example study*