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Statistics > Estimation of Population Mean: Sigma Not Known
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QuickNotes™  

Estimation of Population Mean: Sigma Not Known

  • The t-distribution is a bell-shaped distribution with the same mean and a larger distribution than the standard normal distribution.

  • When working with the t-distribution, always remember the degrees of freedom, ν = n − 1.

  • Use the t-distribution when the sample is from a normal distribution and when the population standard deviation is unknown.

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