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10 cards from this deck
Population variance unknown
n−1n - 1n−1
t=Xˉ−μ0S/nt = \frac{\bar{X} - \mu_0}{S/\sqrt{n}}t=S/nXˉ−μ0
Makes it an unbiased estimator
Heavier tails than Normal distribution
Large sample size (n≥30n \geq 30n≥30)
Population Normal, sample random
Xˉ±t×sn\bar{X} \pm t \times \frac{s}{\sqrt{n}}Xˉ±t×ns
Both tails of distribution
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