A Sample of Eight People Attended a Two Day Course

question 3

Multiple Choice

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.

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Definitions:

Infrastructure

The fundamental facilities and systems serving a country, city, or area, including transportation and communication systems, water and power lines, and public institutions like schools, post offices, and prisons.

Aquifer

An underground layer of water-bearing permeable rock, rock fractures, or unconsolidated materials from which groundwater can be extracted using a water well.

Porous Layers

Geological formations consisting of rocks, soil, or sediment that have a high porosity, allowing for the passage and storage of fluids such as water and oil.

Underground Rock

Underground rock refers to rock formations that exist beneath the Earth's surface, playing a critical role in various geological processes and resource reservoirs.