Vol: 35 Page: 165

Authors:
Joanna Tarasińska

Title:
 Some remarks on the precision of confidence interval for mean in normal populations

Language: English

Keywords:
confidence intervals for mean
precision of confidence interval
normal population

Summary:
The precision of confidence interval for the mean of normal variable defined as the ratio of the half of the length and the centre of CI is considered. The probability distribution of the precision is investigated for both σ known and unknown cases. It turns out that this distribution is very sensitive to small changes of population coefficient of variation.