A place to ask. answer, and discuss questions and material from our weekly notes and videos. When investors buy mutual funds, some funds can be purchased directly from banks for other financial institutions) while others must be purchases through brokers who charge a fee for the service. We want to find out whether the investors do better by buying mutual funds directly than purchasing mutual funds through brokers. We randomly sampled the annual returns from mutual funds that can be acquired directly and mutual funds that are bought through brokers. Then record the net annual returns which are the returns on investment after deducting all relevant fees. Based on the given information, what statistical method we should use in this case? Be specific about the name of the statistical method (One-Sampler Confidence Interval. One-Sample (-Test or Something else). Explain why your method and why not other methods learned In this class