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10 questions from this quiz
When population variance is unknown
141414
To make it an unbiased estimator
t=Xˉ−μ0S/nt = \frac{\bar{X} - \mu_0}{S/\sqrt{n}}t=S/nXˉ−μ0
Heavier tails
When sample size n≥30n \geq 30n≥30
Normal population & random sample
6%6\%6%
Xˉ±t×sn\bar{X} \pm t \times \frac{s}{\sqrt{n}}Xˉ±t×ns
Sample mean used in variance calculation
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