sign test


Also found in: Dictionary, Wikipedia.

sign test

[′sīn ‚test]
(statistics)
A test which can be used whenever an experiment is conducted to compare a treatment with a control on a number of matched pairs, provided the two treatments are assigned to the members of each pair at random.
References in periodicals archive ?
The test statistics are the paired sample Student's t, the nonparametric Sign test (M) and the nonparametric Wilcoxon Signed Rank (S).
No colonies showed significant bottlenecks under the sign test. UCO, West and East Arcadia showed mode shifts across both sampling schemes.
The comparative analyses of the three versions of the personal texts with the statements of purpose, essential values and vision were made by means of descriptive statistics and also by the non-parametric statistical test "sign test for medians" (Triola, 2005).
Evaluation of wave amplitudes, as measured by EMG, within and between groups Amplitude Group A Group B Preop 2.49[+ or -]1.38 (2.2) 2.23[+ or -]1.01 (2.5) Postop 2.49[+ or -]1.38 (2.2) 2.36[+ or -]1.42 (1.8) Preop-postop (2)p - 0.893 Amplitude Group C Group D Preop 0.96[+ or -]0.7 (0.7) 1.99[+ or -]0.85 (1.7) Postop 1.35[+ or -]0.79 (1.3) 1.93[+ or -]0.78 (1.7) Preop-postop (2)p 0.068 0.500 Amplitude (1) p Preop 0.133 Postop 0.514 Preop-postop (2)p EMG: electromyography (1) Kruskal-Wallis test (2) Wilcoxon sign test Units of the values are millivolts (mV).
An issue with the sign test relates to the fact it does not account for the size of each effect.
N Sign test p value Wilcoxon p value I (field) and I (ICP) 23 0.000004 0.00003 I (field) and I (LGS) 23 0.000030 0.00003 I (ICP) and I (LGS) 23 0.000175 0.00047
There was a significant improvement in the Wexner score post-procedure (12.5 pre-injection, 7.9 post-injection; p=0.0005, Wilcoxon rank sign test, Figure 2).
Animal evinced pain on palpating the left stifle joint and positive for the cranial drawer sign test and anterior tibial thrust which was suggestive of cranial cruciate ligament rupture, accordingly surgical stabilisation using both medial and lateral retinacular imbrication technique was planned.
This result is further illustrated by the results from a sign test (Pesaran and Timmermann [19]).
Thompson's sign test is not very obvious in some patients with AATR for the intact plantar tendon or more proximal rupture.
We evaluated potential under- or overstatement of duration using a sign test. The sign test is a test of the difference in medians.
Under such general conditions on, the sign test is a locally most powerful test for [H.sub.0] against [H.sub.1] when the sample distribution is double exponential (Hettmansperger 1984, page 9-12).