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For the rank correlation coefficient, what test statistic is used to test the null hypothesis that the correlation is zero?
Health Insurance
A type of insurance coverage that pays for medical and surgical expenses incurred by the insured, either reimbursing the insured for expenses incurred from illness or injury, or paying the care provider directly.
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A federal government program in the United States that provides retirement, disability, and survivors' benefits to eligible individuals.
Contributory Program
A social program financed through the contributions of its participants, often via taxes or premiums, providing benefits based on those contributions.
Social Security
A government program that provides financial assistance to people who are retired, disabled, or otherwise eligible for benefits based on their earnings records.
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