For the each of the following studies determine which type of analyses is most appropriate. Explain your answer. A. A researcher is examining whether the effect of violent video games on aggressive behavior is the same at different ages. She recruited 90 participants, 30 from elementary schools, 30 from junior high schools and 30 from senior high schools. She then assigned half of the participants in each age group to play violent video games and another half to play non-violent video games. Aggressive behaviors were observed after children playing video games. B. A researcher is examining the effect on emotion on memory by presenting a group of participants with a series of happy, neutral and sad pictures and then recording how much information in each type of pictures can be recalled by each participant. C. A researcher is evaluating the effectiveness of a new therapy in treating depression. He recruits a group of depressed patients and administered the therapy to them. After the therapy, the average score of depression became 20. It is known that the average score in the depressed population is 25 (the population standard deviation of depression is not known). D. A researcher is interested in whether the amount of time students spend on studying would predict their GPA. Each participating student is asked to report his or her GPA as well as how many hours he or she study every week.
For the each of the following studies determine which type of analyses is most appropriate. Explain your answer.
A. A researcher is examining whether the effect of violent video games on aggressive behavior is the same at different ages. She recruited 90 participants, 30 from elementary schools, 30 from junior high schools and 30 from senior high schools. She then assigned half of the participants in each age group to play violent video games and another half to play non-violent video games. Aggressive behaviors were observed after children playing video games.
B. A researcher is examining the effect on emotion on memory by presenting a group of participants with a series of happy, neutral and sad pictures and then recording how much information in each type of pictures can be recalled by each participant.
C. A researcher is evaluating the effectiveness of a new therapy in treating depression. He recruits a group of depressed patients and administered the therapy to them. After the therapy, the average score of depression became 20. It is known that the average score in the depressed population is 25 (the population standard deviation of depression is not known).
D. A researcher is interested in whether the amount of time students spend on studying would predict their GPA. Each participating student is asked to report his or her GPA as well as how many hours he or she study every week.
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