(Solved): Hello, can you help me to find the SS Within groups please?  A statistics instructor wonders wh ...

A statistics instructor wonders whether significant differences exist in her students' final exam scores in her three different sections. She randomly selects the scores from 10 students in each section. A portion of the data is shown in the accompanying table. Assume exam scores are normally distributed. (You may find it useful to reference the \( F \) table.) picture Click here for the Excel Data File: \begin{tabular}{lllll} 126 & & \( -1 \) & \( x \) & \( f x \) \\ \hline A & B & C & D \end{tabular} \begin{tabular}{|c|r|r|r|} \hline 1 & Section 1 & Section 2 & Section 3 \\ \hline 2 & 85 & 91 & 74 \\ \hline 3 & 68 & 84 & 69 \\ \hline 4 & 69 & 92 & 62 \\ \hline 5 & 52 & 78 & 78 \\ \hline 6 & 68 & 78 & 54 \\ \hline 7 & 95 & 70 & 67 \\ \hline 8 & 80 & 73 & 67 \\ \hline 9 & 74 & 87 & 84 \\ \hline 10 & 63 & 59 & 66 \\ \hline 11 & 74 & 75 & 73 \\ \hline 12 & & & \\ \hline \end{tabular}