An Instructor Gives a Test Before and After a Lesson

question 40

Essay

An instructor gives a test before and after a lesson and results from randomly selected students are given below. At the 0.05 level of significance, test the claim that the lesson has no effect on the grade. Use Wilcoxon's signed-ranks test. $$\begin{array} { l l l l l l l l l l l l l l l l } \text { Before } & 54 & 61 & 56 & 41 & 38 & 57 & 42 & 71 & 88 & 42 & 36 & 23 & 22 & 46 & 51 \\\hline \text { After } & 82 & 87 & 84 & 76 & 79 & 87 & 42 & 97 & 99 & 74 & 85 & 96 & 67 & 84 & 79\end{array}$$

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Definitions:

Beethoven

Beethoven was a German composer and pianist, a crucial figure in the transition between the Classical and Romantic eras in Western music.

Somatosensory Projection Area

The region of the brain's cerebral cortex involved in processing sensory information from the body, including touch, temperature, and pain.

Topographically

Relating to the arrangement or accurate representation of the physical features of an area.

Occipital Lobe

The region of the brain located at the back of the cerebral cortex, responsible for processing visual information.