A survey was conducted on 193 Duke University undergraduates who took an introductory statistics course in 2012. Among many other questions, this survey asked them about their GPA, which can range between 0 and 4 points, and the number of hours they spent studying per week. The scatterplot below displays the relationship between these two variables.

a) What is the explanatory variable and what is the response variable?
b) Describe the relationship between the two variables. Make sure to discuss unusual observations, if any.
c) Is this an experiment or an observational study?
d) Can we conclude that studying longer hours leads to higher GPAs?
 

Transcribed Image Text:

4.0 3.5- 3.0- 2.5- 20 40 60 Study hours/week GPA 4.0 3.5- 3.0- 2.5- 20 40 60 Study hours/week GPA

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a A variable that explains variation in other variables is known as an explanatory variable In a stu... View the full answer