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10 questions from this quiz
Makes s2s^2s2 an unbiased estimator of σ2\sigma^2σ2
Expected value equals population parameter
σ2n\frac{\sigma^2}{n}nσ2
At least 30
sn\frac{s}{\sqrt{n}}ns
1.96
Width increases
Halves
We are 95% confident μ\muμ lies in interval
When population variance is known
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