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Correlations: categorical versus continuous
Your book discusses the conditions under which you would perform a Pearson product moment correlation and a . In this activity, you will apply that understanding.
- Read the relevant xkcd: https://xkcd.com/552/
- What are the variables and levels?
- What are your test options for examining relations between two variables?
- As the comic discusses the variables, what is the correct option for examining a relation between variables?
- How would you change the variables (identify a specific measurement for each) into interval level variables?
Creating hypotheses for
Your book discussed the hypotheses for a with two categorical variables. In this activity, you will apply that information.
- Go to the following website: http://flowingdata.com/2016/08/09/household-types-then-and-now/
- What are the two variables?
- What level of measurement is each variable?
- Is the level of data appropriate for a ?
- What is your hypothesis?
Understanding differences between , Pearson product moment correlation, and two-way ANOVA
Your book discussed the conditions under which you would use a , a Pearson product moment correlation, and a two-way ANOVA. In this activity, you will apply this information.
- What are the variable requirements (how many and at what level of measurement) for:
- Pearson product moment correlation, and
- two-way ANOVA.
- Go to the following website: http://www.newsindata.com/college-athlete-drug-use-by-sport
- As the data are presented, what test would be appropriate?
- How would you have to change the study to conduct a Pearson product moment correlation? Provide a specific way to measure the variables in units. If you are having a difficult time answering this question, you might want to focus on just one variable level for each variable (i.e., marijuana and hockey).
- How would you change the study to conduct a two-way ANOVA? Provide a specific way to measure the variable in units. If you are having difficulty answering this question, do not forget that ANOVA contains a DV measured continuously.