b course hero - Bing X Homework Help - Q&A from On x Bb WileyPLUS Online Homework - E X NWP Assessment Builder UI App X NWP Assessment Player UI Appli X + X @ https://education.wiley.com/was/ui/v2/assessment-player/index.html?launchld=49114399-c185-4a51-bc34-9d1edd8cf86f#/question/10 1.3 Online Homew Question 11 of 12 -13 = View Policies Current Attempt in Progress Be Sure to Get Your Beauty Sleep! New research supports the idea that people who get a good night's sleep look more attractive. In the study, 23 subjects ages 18 to 31 were photographed twice, once after a good night's sleep and once after being kept awake for 31 hours. Hair, make-up, clothing and lighting were the same for both photographs. Observers then rated the photographs for attractiveness, and the average rating under the two conditions was compared. The researchers report in the British Medical Journal that "Our findings show that sleep-deprived people appear less attractive compared with when they are well rested. Stein, R., "Beauty sleep no myth, study finds". Washington Post. washingtonpost.com, accessed December 15, 2010. (a) What is the explanatory variable? What is the response variable? eTextbook and Media Hint (b) Is this an experiment or an observational study? If it is an experiment. is it a randomized comparative design or a matched pairs design? O Observational study O Matched pairs experiment Randomized comparative experiment e Textbook and Media Hint (c) Can we conclude that sleep deprivation ca ople to look less attractive? Why or why not? O No. we cannot, because no association was found. O No. we cannot, because this was an observational study. O Yes, we can, because ociation was found and that is enough. Yes, we can, because tion was found and the result comes from an experiment. Textbook and Media Type here to search W P 66.F Mostly clear ~ 0 6 7 4x ENG 10:18 AM 9/7/2021TU myTU | Towson University X Bb WileyPLUS Online Homework - E X NWP Assessment Builder UI App X NWP Assessment Player UI Appli X + X @ https://education.wiley.com/was/ui/v2/assessment-player/index.html?launchld=49114399-c185-4a51-bc34-9d1edd8cf86f#/question/8 1.3 Online Homew Question 9 of 12 -13 5 View Policies Current Attempt in Progress Does Buying Organic Food Improve Your Health? The National Health and Nutrition ExaminationSurvey (NHANES)1 surveys a large national random sample of Americans about a wide variety of health related topics. Among many questions, the 2009-2010 survey included a question about eating organic (" In the past 30 days, did you buy any food that had the word 'organic' on the package?"), and also a question about self-reported health status ("Would you say your health in general is Excellent, Very good, Good, Fair, or Poor?"). For the 5060 people who answered both questions, 46 ple who had bought organic food reported their health as very good or excellent, as opposed to only 33% of the people who had not bought organic food. Remember that there are three possible explanations for this observed difference: (i) Causal association; buying (and then, presumably eating) organic food improves general health status. (ii) Association due to confounding: the groups (people who buy organic and those who don't) differed to begin with. (ili) No actual association; just random chance. Also recall that evaluating evidence for the causal explanation, (1), requires evaluating evidence against the alternative explanations, (in) and (iii). In Chapter 6 we rule out explanation (iii). What about explanation (ii)? 1. https://www.cic.govinchshanes/index.htm Does this study provide evidenc ounding and groups differing to begin with? Why or why not? O Yes, because this is a randomized experiment. O Yes, because it was a O No, because this is an observational study. O No. because only 5060 people were in the study. O Yes, because the people who conducted the study asked the right questions. e Textbook and Media Assistance Used Hint Assistance Used If your answer to part (a) was no, which of the following might be a potential confounding variable or a way in which the groups may differ to begin with. Just because the sar mean we can generalize. O Income, because orga thier people are generally healthier. O Organic food is healthier b esn't contain pesticides. eTextbook and Media Hint Based on your answer to part (a), does this study roves general health status? O Ye O No eTextbook and Media Type here to search W P 66.F Mostly clear ~ 0 6 (7 () ENG 10:16 AM 9/7/2021