leona wants to investigate middle school students study habits she thinks that there is a relationship between the amount of studying and a students grade point average what variables should she use to collect data

To investigate middle school students study habits and their relationship with their grade point average, Leona should collect data on the following variables:

1. Amount of time spent studying per week
2. Grade point average (GPA)
3. Number of study sessions per week
4. Type of study materials used (e.g. textbooks, notes, online resources)
5. Study environment (e.g. at home, library, school)
6. Participation in study groups or tutoring
7. Self-reported study habits and strategies (e.g. note-taking, highlighting, summarizing)
8. Attendance and participation in class discussions and activities

By collecting data on these variables, Leona can analyze the relationship between study habits and GPA and draw conclusions about the effectiveness of different study strategies on academic performance.