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 as follows
$\begin{array}{l|cccccccc}\text { Student } & 1 & 2 & 3 & 4 & 5 & 6 & 7 & 8 \\\hline \text { Pretest } & 59 & 78 & 65 & 62 & 66 & 67 & 77 & 77 \\\text { Posttest } & 72 & 80 & 77 & 65 & 73 & 50 & 90 & 69\end{array}$

a) Compute the test statistic
b) Can you conclude that the median scores differ between the pretest and postest? Use the $\alpha = 0.10$ level of significance.

A) a) $\mathrm { S } = 12$
b) We can not conclude that the median of the pretests and postests are different.
B) a) $\mathrm { S } = 12$
b) We can conclude that the median of the pretests and postests are different.
C) a) $S = 11$
b) We can conclude that the median of the pretests and postests are different.
D) a) $\mathrm { S } = 11$
b) We can not conclude that the median of the pretests and postests are different.