Concerning Inference on Two Independent Population Means, the Pooled Variance

question 6

Multiple Choice

Concerning inference on two independent population means, the pooled variance estimate is:

• A) a way of estimating variance that relies on the information provided by only one of the samples.
• B) an unbiased estimator of the parameter .
• C) a combined (using a weighted average) estimate for the unknown variance of two populations.
• D) a less efficient but easier way of estimating population variances as compared to using two separate variance estimates (one for each population).

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