This study reports the statistical significance of using Graphene Oxides (GOs), Graphene Nanoplatelets (GNPs) and Carbon Nanotubes (CNTs) on the mechanical properties of cement paste. Samples containing several nanoparticles' weight fractions were prepared and tested for flexure and compression. The testing results were then statistically analysed using the t-statistical method to investigate the significance of using Nanomaterials on the properties of cement paste. The results highlighted the significance of using GOs and CNTs on the flexural strength of cement paste. Mixes containing 0.04% GOs, 0.08% GOs and 0.12% CNTs could enhance the flexural strength by at least 45% compared to the plain control mix. On the other hand, test results showed the significance of using 0.04% GNPs, 0.08% CNTs and 0.12 % GOs in increasing the compressive strength of cement paste by at least 10% compared to the plain control mix. Microstructural analysis using Scanning Electron Microscope (SEM) showed that proper Nanofilaments dispersion in most batches. Furthermore, the analysis highlighted the nanoparticles' impediment within the cement hydration products.