When Estimating a Confidence Interval for the Difference Between 2

question 41

Multiple Choice

When estimating a confidence interval for the difference between 2 means using the method where sample variances are pooled,which of the following assumptions is not needed?

• A)The populations are normally distributed.
• B)The populations have equal variance.
• C)The samples are independent.
• D)The sample sizes are equal.

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Definitions:

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