A researcher wants to know whether identical twins differ in their self-confidence. Specifically, she wants to know whether the twin that was born first benefits from being "the older" twin. Which type of t-test would be most appropriate for comparing the average self-confidence of older twins to the younger twins? Group of answer choices matched-subjects t-test one-sample t-test independent-samples t-test repeated-measures t-test

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Q: what is the test statistic for Tool B? What is the p value?

A:

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