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The chi-squared test of a contingency table is based upon:
Cellular wastes
Unwanted or toxic byproducts produced by cells during metabolism and other biological processes, which need to be removed or recycled to maintain cellular health.
Multiple sclerosis
A chronic autoimmune disease that affects the central nervous system, leading to muscle weakness, coordination problems, and other symptoms.
Myelin sheaths
Myelin sheaths are protective coverings around nerve fibers in the brain and spinal cord, which help increase the speed at which electrical impulses are transmitted along the nerve cells.
Chromosome 21
One of the 23 pairs of chromosomes in humans, with an extra copy of chromosome 21 leading to Down syndrome, a genetic disorder.
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