The classical two-sample t-test works well for the normally distributed data or data with large sample size. The tcfu() and tt() tests implemented in this package provide better type-I-error control with more accurate power when testing the equality of two-sample means for skewed populations having unequal variances. These tests are especially useful when the sample sizes are moderate. The tcfu() uses the Cornish-Fisher expansion to achieve a better approximation to the true percentiles. The tt() provides transformations of the Welch's t-statistic so that the sampling distribution become more symmetric. For more technical details, please refer to Zhang (2019) <http://hdl.handle.net/2097/40235>.
Package details |
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Author | Huaiyu Zhang, Haiyan Wang |
Maintainer | Huaiyu Zhang <huaiyuzhang1988@gmail.com> |
License | GPL-2 |
Version | 0.1.0 |
Package repository | View on CRAN |
Installation |
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