Example 3

Caitlyn thinks that there may be a relationship between class size and student performance on standardized tests. She recorded the number of students in 20 classes, along with the average test score in each class, in the following table. Is there a linear relationship between class size and average test score? Use the correlation coefficient, [i]r[/i], to explain your answer.


Walch Education

Material Type
graph  table  correlation  relationship  coefficient  data  scatter-plot  table-of-values  correlation-coefficient 
Target Group (Age)
14 – 18
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