An Instructor Gives a Test Before and After a Lesson

question 28

Essay

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

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Definitions:

Market Power

The ability of a firm or entity to influence the price, quantity, and other market factors of goods or services, often due to its dominant share or unique position.

Horizontal Merger

A business strategy involving the combination of two or more companies at the same stage of production in the same or different industries.

Assimilation

The process by which new employees adjust and adapt to the norms, values, and culture of their workplace.

Integration

The process of combining different systems or processes in a manner that they function cohesively.