Researchers are interested in conducting a study to determine if men or women suffer more from anxiety. Would you conduct an experimental study or an observational study to answer this question?

The authors of a paper describe an experiment to evaluate the effect of using a cell phone on reaction time. Subjects were asked to perform a simulated driving task while talking on a cell phone. While performing this task, occasional red and green lights flashed on the computer screen. If a green light flashed, subjects were to continue driving, but if a red light Flashed, subjects were to brake as quickly as possible. The reaction time (in msec) was recorded. The following summary statistics are based on a graph that appeared in the paper. n = 49 x = 530 S = 65 USE SALT (a) Construct a 95% confidence interval for u, the mean time to react to a red light while talking on a cell phone. (Round your answers to three decimal places.) Interpret a 95% confidence interval for μ, the mean time to react to a red light while talking on a cell phone. We are 95% confident that the mean time to react to a red light while talking on a cell phone is between these two values. There is a 95% chance…

There are several possible explanations for the existence of a statistical relationship between two variables. Which is not a common explanation? A. Common Cause B. Confounding factor C. Coincidence D. None of the above

Compare and contrast an observational study and experiment. Define the terms "treatment group" and "placebo group" as part of your answer. Also give an example of each.