Psychologist have a growing concern about teenagers increases in screen time. A recent research study conducted by the University of Arizona wanted to determine if teenagers with smartphones have a higher chance of developing clinical depression. The following variables are recorded: A. Gender Identity B. Hours spent on smartphones C. Sleep Hours D. Age Years E. Appearance of Depressive Symptoms (Yes or No) Please answer the following questions based on the information above: (S2Q1SACF22VA) 1. Which variables are quantitative? 2. The researchers are primarily interested to see if an increase of time spent on the smartphone have an effect on the onset of depressive symptoms. a) Of the variables listed above, what would be the most appropriate explanatory variable in this study? Explain. b) of the variables listed above, what would be the most appropriate response variable int his study? Explain. 3. Think of one additional variable the researcher should include that was not included in the list of variables above. Explain, why you think this could cause variability in the response variable you gave in 2b.

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