Instructions: YOU MUST SHOW ALL YOUR WORK TO RECEIVE FULL CREDIT. You will need a calculator and the normal table in the back of your textbook to do this assignment. If the value you need is in between two values in the normal table, use the one that is closest. 1. A student carries out a survey of UC Berkeley undergraduates by standing in a heavily trafficked area near Sather Gate one Monday afternoon and asking questions of the first 100 people who are willing to talk to him. Is this survey method like taking a simple random sample of all UC Berkeley undergraduates? Explain why or why not. If there is a potential for bias, name which types of bias you are most concerned about, and explain why. 2. A researcher is interested in whether heavy marijuana use can increase the likelihood of developing schizophrenia in young adults who have a family history of schizophrenia. She starts her research by personally interviewing 100 young adults with a family history of schizophrenia and asking them about how frequently they use marijuana. Assuming that the 100 young adults she is interviewing are representative of the population of young adults she is interested in, what other type of bias might we be concerned about here? What kind of influence could this bias have on her conclusions about the percent of young adults with a family history of schizophrenia who smoke every day