a. Identify whether the study is an experiment or an obser- vational study. Explain. b. Identify the observational units. c. Identify the explanatory and response variables. Also, for each variable...

Extracted text: a. Identify whether the study is an experiment or an obser- vational study. Explain. b. Identify the observational units. c. Identify the explanatory and response variables. Also, for each variable identify whether it is categorical or quantitative.


Extracted text: 6.2.6 In a survey of introductory statistics students, an in- structor asked her students to report how many Facebook friends they had. Suppose that the intent is to study whether there is an association between number of Facebook friends and a person's sex.