Question

H C O F 3 , 7 9 , 13 12 , 16 M 1 ,...

H C O
F 3 , 7 9 , 13 12 , 16
M 1 , 5 3, 7 2, 6

What is the obtained F ratio for the column variable? Correct answer if 3.5 but I don't know how to get there. I found the Sum of Square of column = 56, Mean square error is 48, and mean square variance of column equal to 56/(3-1)=28. I got the answer wrong. Please explain what did I do wrong. Thank you

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