For each of the studies described below, indicate which is the most appropriate
ID: 3133518 • Letter: F
Question
For each of the studies described below, indicate which is the most appropriate statistic that should be used to analyze the data (2 test of independence, independent t, or paired t). For each, explain why you chose the statistic that you chose.
a)A researcher investigates whether children exhibit a higher number of aggressive acts after watching a violent TV show.
b)To test the effectiveness of an afterschool program, a researcher compares the achievement orientation of students in the program with another group of students who are on the waiting list.
c) A researcher seeks to demonstrate a relationship between bath temperature (hot or cold) and the amount of relaxation produced.
d) To test whether “clothes make the person”, researchers measure salesclerks’ time to respond to two customers – one well-dressed and one sloppily dressed.
e) A researcher seeks to determine whether there is a gender difference in preference for nonviolent and violent video games.
Explanation / Answer
a)A researcher investigates whether children exhibit a higher number of aggressive acts after watching a violent TV show.
As this is a before/after experiment, then this is a PAIRED T TEST. [ANSWER]
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b)To test the effectiveness of an afterschool program, a researcher compares the achievement orientation of students in the program with another group of students who are on the waiting list.
As there are 2 independent groups, we have here an INDEPENDENT T TEST. [ANSWER]
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c) A researcher seeks to demonstrate a relationship between bath temperature (hot or cold) and the amount of relaxation produced.
As we want to establish dependence, then we need a CHI SQUARED TEST OF INDEPENDENCE. [ANSWER]
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d) To test whether “clothes make the person”, researchers measure salesclerks’ time to respond to two customers – one well-dressed and one sloppily dressed.
As the same set of clerks attend to the two customers, then the data can be paired. So, PAIRED T TEST. [ANSWER]
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e) A researcher seeks to determine whether there is a gender difference in preference for nonviolent and violent video games.
As we cant to establish dependence of gender and preference in video games, then we use CHI SQUARED TEST OF INDEPENDENCE. [ANSWER]
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