A researcher is analyzing data about students in a school district to determine whether there is a relationship between grade point average and number of absences. The researcher plans on compiling data from several sources to create a record for each student.
The researcher has access to a database with the following information about each student.
> Last name
> First name
> Grade level (9, 10, 11, or 12)
> Grade point average (on a 0.0 to 4.0 scale)
The researcher also has access to another database with the following information about each student.
> First name
> Last name
> Number of absences from school
> Number of late arrivals to school
Upon compiling the data, the researcher identifies a problem due to the fact that neither data source uses a unique ID number for each student. Which of the following best describes the problem caused by the lack of unique ID numbers?
answer choices
a. Students who have the same name may be confused with each other.
b. Students who have the same grade point average may be confused with each other.
c. Students who have the same grade level may be confused with each other.
d. Students who have the same number of absences may be confused with each other.