Cluster analysis was done in order to group composites with similar mechanical properties. In this multivariate analysis, every sample was described by results obtained from the three different response properties: i.e. 300 % modulus, tensile strength and elongation at break. Euclidian distance was used to measure the similarity between the treatments. Ward’s method was used as the linkage method. Multiple means comparison Tukey–Kramer test, at a significance level a of 0.05, was performed, in order to further compare the resulting groups.