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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 nameFirst nameGrade 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 nameLast nameNumber of absences from schoolNumber of late arrivals to schoolUpon 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?

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