P-values and confidence intervals of linear rank tests for left-truncated data under truncated binomial design

ABSTRACT

The paper provides computations comparing the accuracy of the saddlepoint approximation approach and the normal approximation method in approximating the mid-p-value of Wilcoxon and log-rank tests for the left-truncated data using a truncated binomial design. The paper uses real data examples to apply the comparison, along with some simulated studies. Confidence intervals are provided by the inversion of the tests under consideration.

KEYWORDS:

• Left-truncated data
• truncated binomial design
• linear rank tests
• p-value
• saddlepoint approximation

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Funding

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