12.30: An app for tracking alcohol use, and ANOVA:Researchers investigated the use of an app for tracking alcohol consumption on the number of drinks a person consumed over a 3-week period. Participants logged each time they had a drink, and the researchers summed the number of drinks that each participant had each week. The researchers analyzed whether there was a significant difference in the number of drinks consumed across the 3 weeks of the study (Poulton et al., 2018). Let's imagine that we've redesigned their study to add a second independent variable: Researchers randomly assigned half of the participants to receive a daily reminder to log their drinks and half received no reminder.

a. What are the independent variables and their levels?

b.What kind of ANOVA would we use?