exam 3

The article "Americans are 'Getting the Wrong Idea' on Alcohol and Health"t reported that observational studies in recent years that have concluded that moderate drinking is associated with a reduction in the risk of heart disease may be misleading. The article refers to a study conducted by the Centers for Disease Control and Prevention that showed that moderate drinkers, as a group, tended to be better educated, wealthier, and more active than nondrinkers. Explain why the existence of these potentially confounding variables prevents drawing the conclusion that moderate drinking is the cause of reduced risk of heart disease. (Select all that apply.) O Someone who is educated is more likely to not be aware of what constitutes a healthy diet. Someone who is more active is more likely to seek out healthier food. Someone who is wealthier is more likely to purchase healthier food. O Someone who is educated is more likely to seek out healthier food. O Someone who is more active is more…

The article "Americans are 'Getting the Wrong Idea' on Alcohol and Health"† reported that observational studies in recent years that have concluded that moderate drinking is associated with a reduction in the risk of heart disease may be misleading. The article refers to a study conducted by the Centers for Disease Control and Prevention that showed that moderate drinkers, as a group, tended to be better educated, wealthier, and more active than nondrinkers. Explain why the existence of these potentially confounding variables prevents drawing the conclusion that moderate drinking is the cause of reduced risk of heart disease. (Select all that apply.) Someone who is more active is more likely to avoid healthier food. Someone who is wealthier is more likely to purchase healthier food. Someone who is more active is more likely to seek out healthier food. Someone who is educated is more likely to seek out healthier food. Someone who is educated is more likely to not be aware of what…

The article "Americans are 'Getting the Wrong Idea' on Alcohol and Health"† reported that observational studies in recent years that have concluded that moderate drinking is associated with a reduction in the risk of heart disease may be misleading. The article refers to a study conducted by the Centers for Disease Control and Prevention that showed that moderate drinkers, as a group, tended to be better educated, wealthier, and more active than nondrinkers. Explain why the existence of these potentially confounding variables prevents drawing the conclusion that moderate drinking is the cause of reduced risk of heart disease. (Select all that apply.) a. Someone who is more active is more likely to avoid healthier food. b.Someone who is more active is more likely to seek out healthier food. c. Someone who is wealthier is more likely to purchase healthier food. d.Someone who is educated is more likely to seek out healthier food. e.Someone who is educated is more likely to not be aware…

The article "Teenage Physical Activity Reduces Risk of Cognitive Impairment in Later Life"+ describes a study of more than 9,000 women from Maryland, Minnesota, Oregon, and Pennsylvania. The women were asked about their physical activity as teenagers and at ages 30 and 50. A press release about this studyt generalized the results of this study to all American women. In the press release, the researcher who conducted the study is quoted as saying the following. Our study shows that women who are regularly physically active at any age have lower risk of cognitive impairment than those who are inactive but that being physically active at teenage is most important in preventing cognitive impairment. Answer the following four questions for this observational study. (a) What is the population of interest? O all teenage girls all women in Maryland, Minnesota, Oregon and Pennsylvania all women all women between 30 and 50 all American women (b) Was the sample selected in a reasonable way? O No,…

If the alternative hypothesis states that alcohol affects short-term memory, the null hypothesis states O alcohol does not affect short-term memory O alcohol decreases short-term memory alcohol does not decrease short-term memory

The General Social Survey (GSS) found that 571 out of 670 (85%) Americansanswered the question on experimental design correctly. Do these data provideconvincing evidence that more than 80% of Americans have a good intuitionabout experimental design?

The authors of the paper "Age and Violent Content Labels Make Video Games Forbidden Fruits for Youth"† carried out an experiment to determine if restrictive labels on video games actually increased the attractiveness of the game for young game players. Participants read a description of a new video game and were asked how much they wanted to play the game. The description also included an age rating. Some participants read the description with an age restrictive label of 7+, indicating that the game was not appropriate for children under the age of 7. Others read the same description, but with an age restrictive label of 12+, 16+, or 18+. The paper gave data for 12- to 13-year-old girls. Data consistent with summary values in the paper are shown below. 7+ label 12+ label 16+ label 18+ label 6 4 6 8 8 5 4 6 6 5 8 6 5 6 6 7 4 3 10 7 6 5 9 4 4 3 6 10 5 8 6 6 10 5 8 8 5 9 5 7   Do the data provide convincing evidence that the mean rating associated with the game…