Results of the mechanical strength properties are presented in Table 3. For comparison purposes results from previous studies on particleboards manufactured from 100% Wood, Hurd and Shive materials to a target density of 620 kg/m3 are included in the table. It is evident from the table that the densities of the fiber reinforced particleboards are significantly higher than those of the 100% Wood, Hurd and Shive particleboards. To enable an accurate comparison between the mechanical strength properties of these particleboard types, an analysis of covariance (ANCOVA) was carried out to eliminate the effect of variability due to density differences. Where applicable logarithmic transformations were applied to ensure that all analysis met the assumptions regarding the error term (i.e., independent observations, normal distribution and equal variance).