A Sample of Eight People Attended a Two Day Course

A sample of eight people attended a two day course that prepares students for college admission testing. The students were given a pretest before the course and a posttest after the course. The results were as follows.
$\begin{array} { l | c c c c c c c c } \text { Student } & 1 & 2 & 3 & 4 & 5 & 6 & 7 & 8 \\\hline \text { Pretest } & 66 & 74 & 74 & 71 & 70 & 72 & 65 & 66 \\\text { Posttest } & 79 & 76 & 63 & 67 & 64 & 89 & 78 & 74\end{array}$

a) Compute the test statistic
b) Can you conclude that the median scores differ between the pretest and posttest? Use the α = 0.10
Level of significance.

A) a) S=10
b) We cannot conclude that the median of the pretests and posttests are different.
B) a) S=10
b) We can conclude that the median of the pretests and posttests are different.
C) a) S=9
b) We cannot conclude that the median of the pretests and posttests are different.
D) a) S=9
b) We can conclude that the median of the pretests and posttests are different.