A researcher wanted to see if teachers who sanitized their hands more often will miss less days of instruction. 250 teachers in a large school district agreed to participate in a study. 125 were randomly selected and given a smartwatch which would vibrate to alert them to sanitize their hands every hour. The other 125 were not given any alert. Neither group was told what the study was about and the study lasted for 1 school year. The following variables were recorded: Name Age Years of experience teaching Whether they were in the group of teachers that got the smartwatch reminders. Number of days they missed the previous year. Number of days they missed over the course of the study. Part A - Variables Which of the variables above is quantitative? The researcher is most interested in seeing how the smartwatch reminders to sanitize hands effects the number of days an instructor calls in sick. Of the variables listed above, what would be the most appropriate explanatory variable and the most appropriate response variable? Describe one additional variable the researcher might want to include in their study and explain why. Part B - Design of Study 4. Is the design of this study an experiment with random assignment or observational study? Explain. 5. Describe a method the researchers can use to decide which of the 250 teachers receive the smartwatch reminders and which teachers don't