The ratio of two independent chi-squared variables divided by their degrees of freedom is:
A. normally distributed.
B. Student t distributed.
C. chi-squared distributed.
D. F-distributed.
Analysis:
A. Incorrect. The ratio of two independent chi-squared variables divided by their degrees of freedom is F-distributed.
B. Incorrect. The ratio of two independent chi-squared variables divided by their degrees of freedom is F-distributed.
C. Incorrect. The ratio of two independent chi-squared variables divided by their degrees of freedom is F-distributed.
D. Correct. The ratio of two independent chi-squared variables divided by their degrees of freedom is F-distributed.
ANSWER : D
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