For two-sample t with n₁ = n₂ = 25 and s₁ = s₂ = 4, SE(x̄₁ − x̄₂) =
- A
2.0
- B
0.8
- Ccheck_circle
1.13
- D
1.6
Explanation
SE = √(16/25 + 16/25) = √1.28 ≈ 1.13.
Setting Up a Test for the Difference of Two Population Means
AP Statistics· difficulty 4/5
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