Suppose the IQ scores for the US adult population follow a normal distribution with mean equal to 100 and standard deviation equal to 15. If you pick a person at random, what is the probability that his IQ is greater than 105. (round to 4 decimal places) Answer: Students collected data on city residents shopping in their city's downtown stores and another sample from city residents that were shopping at the mall on the outskirts of the city. They found that those shopping downtown were significantly more likely to vote for the school millage (tax) than those shopping at the mall. Can we form a cause-and-effect conclusion from this study? Select one: O a. No O b. Yes O c. Cannot be determined Is random sampling or random assignment the more important consideration if the research question is whether UCLA student commuters tend to have lower grade point averages than students who live on campus? Select one: O a. Both O b. Cannot conclude based on the given information. O c. Random sampling O d. Random assignment