Question: You are interested in the effect of how the age of students VS affects their grades in college. To test the effect you setup a study to analyze the affect that a student’s age has on their grades in college. You divide the students into groups and record their overall GPA in college. The results follow:

Table 1: Summary of the Analysis of Variance of the Effect of Age on Student Grades.

Source of

Variation SS d _f MS F P

Student Grade: 2420 2 1210.0 4.5 <.05

Error: 7260 27 268.9

Total: 9680 29

1. What is the factor (4 points)?
2. What is the independent variable (4 points)?
3. What are your null and alternate hypotheses, no formulas (8 points)?
4. How many levels were in the treatment (4 points)?
5. How many subjects were in the study (4 points)?
6. What is your decision (4 points)?

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