Confidence Intervals for the Coefficient Alpha Difference from Two Independent Samples (Groups)

Performance Evaluation of Confidence Intervals for Ordinal Coefficient Alpha

Improved Confidence Intervals for the Difference between Two Proportions

Confidence Intervals for the Difference of Two Normal Population Variances

Motivated by the recent work of Herbert, Hayen, Macaskill and Walter [Interval estimation for the difference of two independent variances. Communications in Statistics, Simulation and Computation, 40: 744-758, 2011.], we investigate, in this paper, new confidence intervals for the difference between two normal population variances based on the generalized confidence interval of Weerahandi [Gene...

Confidence intervals for the difference between two means

Introduction This procedure calculates the sample size necessary to achieve a specified distance from the difference in sample means to the confidence limit(s) at a stated confidence level for a confidence interval about the difference in means when the underlying data distribution is normal. Caution: This procedure assumes that the standard deviations of the future samples will be the same as ...

Small-sample comparisons of confidence intervals for the difference of two independent binomial proportions

This paper compares the exact small-sample achieved coverage and expected lengths of fivemethods for computing the confidence interval of the difference of two independent binomial proportions.We strongly recommend that one of these be used in practice. The first method we compare is an asymptotic method based on the score statistic (AS) as proposed by Miettinen and Nurminen [1985. Comparative ...