Hi there,

I have a question about ANOVA test.

Say there are 5 students and 4 subjects and score. so 3 columns in data.

Each student has two attempts.

Data looks like below:

Stduent 1 math 63

Stduent 1 math 45

Stduent 1 Science 64

Stduent 1 Science 75

Stduent 2 math 28

Stduent 2 math 70

Stduent 2 Science 60

Stduent 2 Science 59

Stduent 3 math 48

Stduent 3 math 80

Stduent 3 Science 49

Stduent 3 Science 67

Stduent 4 math 59

Stduent 4 math 90

Stduent 4 Science 90

Stduent 4 Science 80

Stduent 5 math 89

Stduent 5 math 79

Stduent 5 Science 79

Stduent 5 Science 50

1. In this case, how can plot the score by student + subject?

2. How can I conduct ANOVA test with grouping student+subject?

3. If this data is given, and the question is

"Construct two different preliminary graphs that investigate different features of the data and comment." which graphs are good for this questions? ( I was thinking Normal QQ plot of residuals, boxplot)

Thanks