statistics

CRITIQUING THE MEDIA Consider the following news article. Does TV make kids want to buy toys? Watching television has been linked to many problems in children, including obesity. Could it also be linked to asking for toys? How do we make children stop asking for toys? Could it be just turning off the television? A recent study taught 88 third- and fourth-graders a series of 18 mini-lessons in school over a six-month period, aimed at helping them learn to watch television within a budgeted amount of time. The researchers, lead by Dr. Thomas Robinson, then asked them to limit their TV watching to just seven hours per week. Not all of the children were able to stay within this budget, but most reduced the amount of TV watched by about one-third. To allow them to make a comparison, the researchers selected a control group of 87 students from a different elementary school. This control group did not get the training sessions and were not asked to budget their TV time. The group that watched a reduced amount of television were much less likely to ask for toys they had seen advertised on television. 1. Is this an experiment or observational study? Why? 2. What is the explanatory variable? 3. What is the response variable? 4. What is a potential lurking variable? 5. Does the setup for this study allow for convincing evidence that reducing TV time will influence the children's requests for tovs? What is a kev weakness in this study? Researchers wanted to examine the relationship between social media use and happiness at CSCC so they randomly select 300 students enrolled at CSCC. The students then identified which social media site they use the most and the results were 100 Facebook users, 100 Twitter users, and 100 Instagram users. The students were then either blocked from social media or allowed to use social media as they normally did. Happiness was rated by the student after one week. 6. What is the population? 7. What is the sample? 8. What is the treatment? 9. Use the information above to outline the diagram for a completely randomized design 10. Use the information above to outline the diagram for a blocked design