What Assumption Is Made So That the Pooled Variance Estimate

question 115

Multiple Choice

What assumption is made so that the pooled variance estimate can be substituted for the population variances within the standard error of the differences formula?

• A)the population variances are homogeneous.
• B)the population variances are heterogeneous.
• C)the sample sizes are equal.
• D)the sample sizes are large.

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