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Some commentaries on confidence intervals of the mean in a Normal population

L. González Abril, L.M. Sánchez-Reyes and F. Velasco Morente
Departamento de Economía Aplicada
Universidad de Sevilla
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  • Abstract
    In this paper, a study on the length of confidence intervals of the mean in a Normal population when the variance is either known or unknown is carried out. It is also proved that ignoring the population variance always leads to a worse interval than when such a variance is taken into account.
  • Keywords: Student's t population, Chi-squared population.
  • AMS Subject classifications: 62F99.
  • PDF PDF (498.69 KB)