# At the Thanksgiving break, I m

At the Thanksgiving break, I measured the correlation between the pre-class quiz grade and the average grade in the class for all 33 students in my stats classes. Below is the output from those results.

Correlation

Pearson correlation of PreClass and Grade = 0.705630

P-Value = < 0.0001

Regression Equation

Grade = 0.24333 + 0.006369P reClass

(a) Determine the critical value in the table and explain how you know these two variables would be considered correlated.

(b) Knowing that there is correlation, use this model to predict the average grade of a student in this class who did not complete any pre-class quizzes.

(c) Assuming everyone in this class completed at least one quiz, would you describe the previous problem as interpolation or extrapolation?

# At the Thanksgiving break, I m

At the Thanksgiving break, I measured the correlation between the pre-class quiz grade and the average grade in the class for all 33 students in my stats classes. Below is the output from those results.

Correlation

Pearson correlation of PreClass and Grade = 0.705630

P-Value = < 0.0001

Regression Equation

Grade = 0.24333 + 0.006369P reClass

(a) What is the slope of the regression equation line?     m =

(b) What does the slope of the line represent in this context?

(c) What is the y-intercept of the regression equation line?     b =

(d) What does the y-intercept of the line represent in this context?

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