In Order to Determine Whether or Not a Special Tutoring

In order to determine whether or not a special tutoring service improves the scores of students in a Business Statistics examination, a sample of 6 students were given the exam before and after using the tutorial service. The results are shown below.
Let d = Score After - Score Before.
$$\begin{array} { | c | c | c | c | c| } \hline \text { Student } & \text { Scare Befora } & \text { Scare After } & & \\\hline \text { A } & 80 & 84 \\\hline \text { B } & 82 & 86 \\\hline \text { C } & 75 & 82 \\\hline \text { D } & 78 & 83 \\\hline \text { E } & 90 & 95 \\\hline \text { F } & 85 & 84 \\\hline\end{array}$$ At α = 0.10, test to see if the tutorial service actually increased scores on the examination.