A thin wire in the shape of a quarter-circle 
has a linear mass density 
Find the mass and the location of the center of mass of the wire.
Definitions:
Two-sample T-test
A statistical test used to determine if there is a significant difference between the means of two independent samples.
Gymnasts' Scores
The numerical values assigned by judges to evaluate the performance of gymnasts in competitions.
Training Technique
A method or approach used to enhance skills, knowledge, or performance in a specific area or activity.
Paired T-test
An analytical procedure for evaluating if two associated groups have significantly different means.
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