In conclusion, the results (Hall coefficient, carrier density, resistance and resistivity) associated with both n-Ge and p-Ge are consistent with the theoretical values. However, the results of the Silver sample are not really satisfying. There can be multiple possibilities and we mentioned some above such as inadequacy of the number of data points and additional contacting resistance. Due to time constraints, at this point we are unable to go back to redo our experiments or try with more samples, so these should be considered in future experiments. One important lesson we learned from this lab is that we need to carefully perform all the preliminary calculations. In this way, we can have a sense of what do we expect so we can quickly identify any error appeared during the process and find a way to fix it. We will definitely keep this in mind in our future experiments.