Establish whether average sat scores differ by instructor

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Reference no: EM131809102

Question: The manager of an SAT review program wonders whether the ethnic background of a student and the program's instructor affect the student's performance on the SAT. Four ethnicities and three instructors are examined. Ten student scores for each combination are sampled. A portion of the data is shown in the following table; the full data set can be found on the text website, labeled ANOVA-SAT.

403_SAT.png

In a report, use the sample information and α = 0.05 to:

1. Determine if there is any interaction between instructor and ethnicity.

2. Establish whether average SAT scores differ by instructor.

3. Establish whether average SAT scores differ by ethnicity.

Reference no: EM131809102

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