Question

a teacher wants to know how much she can predict a student reading level in a given school district. the table shows the grade and reading levels of eight student. what percent of variation in the reading level can be explained by changes in the grade level

Answer 1

The correct answer for this question is this one: "B. 90.7%" The percent of variation in the reading level can be explained by changes in the grade level is 90.7%
You have to compute the coefficient of correlation and then use a formula to get the explained variation.

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These are the following choices:
A. 74.7%
B. 90.7%
C. 82.4%
D. 86.6%