The quantity is called the pooled variance estimate of the common variance of two unknown but equal population variances. It is the weighted average of the two sample variances, where the weights represent the:
A. sample variances.
B. sample standard deviations.
C. degrees of freedom for each sample.
D. None of these choices.
Analysis:
A. Incorrect. The weights represent the degrees of freedom for each sample.
B. Incorrect. The weights represent the degrees of freedom for each sample.
C. Correct. The weights represent the degrees of freedom for each sample.
D. Incorrect. The weights represent the degrees of freedom for each sample.
ANSWER : C
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