# 6. Suppose a researcher used data on a group of third year students at MIT toestimate the following regression (standard errors are in the parenthesis), wheretermGPA is GPA for a term, and atndrte is percentage points of classes attendedduring the termtermGPA 0.625 0.024atndrte(0.115) (0.001)1) If the sample mean atndrte is 82, what is the sample mean of termGPA?2) If student A has atndrte= 84 and student B has atndrte= 68, what is the predicteddifference in their termGPA? A's actual termGPA is 3.2, and B's termGPA is 2.7.Why the predicted difference is not the same as the actual difference?3) If the sample standard deviation of atndrte is 18 and the sample standarddeviation of termGPA is 0.74, what is the sample correlation between atndrte andtermGPA?

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Asked Oct 28, 2019
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Step 1

According to the provided information, the fitted regression line is

Step 2

a)  If the sample mean of atndrte is 82 then the sample mean of termGPA can be calculated as:

Step 3

b) If student A has 84 atndrte and student B has 68 atndrtet then sample mean of termGPA can be ...

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