An experiment was performed to compare the abrasive wear of two different laminated materials

 An experiment was performed to compare the abrasive wear of two different laminated materials. Twleve pleces of material 1 were tested and ten pieces of material 2, with the results in units of abrasive wear being:

Material 1: sample average of 85 with a sample standard deviation of 4

Material 2: sample average of 81 with a sample standard deviation of 5

Can we conclude at the 0.05 level of significance that the abrasive wear of material 1 exceeds that of material 2 by more than 2 units? Assume the populations to be approximately normal with equal variances.