Researchers Investigating the Association Between the Size and Strength of Muscles

question 597

Essay

Researchers investigating the association between the size and strength of muscles
measured the forearm circumference (in inches) of 20 teenage boys. Then they measured
the strength of the boys' grips (in pounds). Their data are plotted.
a. Write a few sentences describing the association.
b. Estimate the correlation. r = ________
c. If the point in the lower right corner (at about 14" and 38 lbs.) were removed, how would
the correlation become stronger, weaker, or remain about the same?
d. If the point in the upper right corner (at about 15" and 75 lbs.) were removed, would the
correlation become stronger, weaker, or remain about the same?

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Definitions:

Task Analysis

The process of breaking down a task into its subtasks, and the strategy necessary for individuals to combine the subtasks into competent performance on the task.

Subtasks

The simpler requisite skills individuals must possess in order to competently perform the main task.

Tasks

Specific activities or assignments given to individuals to perform, which can vary in nature depending on the context.

Sequencing Content

Organizing information or educational material in a logical or meaningful order to facilitate learning or understanding.