When Determining the Pooled Population Variance Estimate in a T

question 11

Multiple Choice

When determining the pooled population variance estimate in a t test for independent means:

• A)the variance of at least one of the original populations must be known (as opposed to estimated), but the other can be estimated from sample scores
• B)the variance of BOTH of the original populations must be known, as opposed to estimated
• C)the estimates based on each of the samples are averaged in such a way as to give more influence to the estimate based on more participants
• D)the scores from both samples are combined to form a single sample, and the estimated variance is figured in the usual way, but using this combined sample

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