Question: A researcher compares differences in academic performance on a standardized assessment among 15 students at a private school and 15 students at a public school.

A researcher compares differences in academic performance on a standardized assessment among 15 students at a private school and 15 students at a public school.

What is the critical value for a two-tailed test with α = .05?

a. ±1.701

b. ±2.048

c. ±2.467

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