Assume that a small (n 30) sample is randomly selected from a normally distributed population for which is unknown Construction of a confidence interval should use the t distribution, but how are the confidence interval limits affected if the normal distribution is incorrectly used instead

Question: Assume that a small (n 30) sample is randomly selected from a normally distributed population for which is unknown. Construction of a confidence

Assume that a small (n ≤ 30) sample is randomly selected from a normally distributed population for which σ is unknown. Construction of a confidence interval should use the t but how are the confidence interval limits affected if the normal is incorrectly used instead?

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