Question

The dynamic modulus of concrete is obtained for two dierent concrete mixes. For the first mix, n 1 =33, x =115.1, and s 1 =0.47 psi. For the second mix, n 2 =31, y =114.6, and s 2 =0.38. Test, with α =0.05, the null hypothesis of equality of mean dynamic mod- ulus versus the two-sided alternative. what assumptions did you make for your answer? check the assumptions

Answer 1