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confidence_t

Half-width of a confidence interval (t distribution).

v = confidence_t(alpha, standard_dev, size)

Like confidence_norm but uses the t distribution with size - 1 degrees of freedom — appropriate when the population standard deviation is unknown and standard_dev is the sample estimate.

confidence_t(0.05, 10, 50)
  • confidence_norm — Half-width of a confidence interval (normal distribution).
  • t_inv_2t — Inverse Student’s t two-tailed CDF.