LATEST MATH 225N MATHWeek 1 Evidence, Claims, and types Questions and Answers

Week 1 Evidence, Claims, and types Questions and Answers 1. A study is planned to research the effects of drinking coffee on hours of sleep. Would an experimental or observational study design be more appropriate? Select the correct answer below: An observational study should be used because it is not possible to control whether or not a person drinks coffee. An observational study should be used because it is not possible to control the number of hours of sleep a person has. An experimental study should be used where the consumption of coffee is the experimental factor. An experimental study should be used where the number of hours of sleep is the experimental factor. 2. A researcher is interested in the effects of watching videos just before bed on the quality of sleep. Which of the following claims would be appropriate for this situation? Select only one answer choice. Select the correct answer below: Watching videos just before bed reduces quality of sleep. More than 60% of people watch videos just before going to bed. Watching 1 hour of video just before going to bed reduces the number of minutes of REM sleep by more than 10%. Watching 1 hour of video just before going to bed reduces the quality of sleep.