Difference of Two Means (Test)
AP Statistics · Flashcards
AP STATISTICS · FLASHCARDS
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QUESTION
What is the purpose of a confidence interval in two-sample t-tests?
QUESTION
Identify a scenario where a paired t-test is more appropriate.
QUESTION
What is the pooled variance formula in a two-sample t-test?
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ANSWER
s
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s_p^2 = \frac{(n_1 - 1)s_1^2 + (n_2 - 1)s_2^2}{n_1 + n_2 - 2}
s
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. Weighted average of sample variances.
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