scholarly journals The uniform general signed rank test and its design sensitivity

Biometrika ◽  
2020 ◽  
Author(s):  
S R Howard ◽  
S D Pimentel
Keyword(s):  
Sensitivity Analysis ◽  
Hypothesis Test ◽  
Design Sensitivity ◽  
Sensitivity Analyses ◽  
Rank Test ◽  
Analysis Model ◽  
Paired Data ◽  
Rank Tests ◽  
Signed Rank ◽  
Signed Rank Test

Summary A sensitivity analysis in an observational study tests whether the qualitative conclusions of an analysis would change if we were to allow for the possibility of limited bias due to confounding. The design sensitivity of a hypothesis test quantifies the asymptotic performance of the test in a sensitivity analysis against a particular alternative. We propose a new, nonasymptotic, distribution-free test, the uniform general signed rank test, for observational studies with paired data, and examine its performance under Rosenbaum’s sensitivity analysis model. Our test can be viewed as adaptively choosing from among a large underlying family of signed rank tests, and we show that the uniform test achieves design sensitivity equal to the maximum design sensitivity over the underlying family of signed rank tests. Our test thus achieves superior design sensitivity, indicating it will perform well in sensitivity analyses on large samples. We support this conclusion with simulations and a data example, showing that the advantages of our test extend to moderate sample sizes as well.

Generalized Rank Tests for Replicated Microarray Data

2005 ◽  
Vol 4 (1) ◽  
Author(s):  
Mei-Ling Ting Lee ◽  
Robert J Gray ◽  
Harry Björkbacka ◽  
Mason W Freeman
Keyword(s):  
Microarray Data ◽  
Block Design ◽  
Rank Test ◽  
Expression Data ◽  
Rank Tests ◽  
Microarray Experiments ◽  
Randomized Block Design ◽  
Signed Rank ◽  
Signed Rank Test ◽  
Statistical Analysis Software

Gene expression data from microarray experiments have been studied using several statistical models. Significance Analysis of Microarrays (SAM), for example, has proved to be useful in analyzing microarray data. In the spirit of the SAM procedures, we develop permutation based rank-tests for generalized Wilcoxon ranksum test for two-group comparisons of replicated microarray data. Also, for microarray experiments with randomized block design, we consider generalized signed rank test. The statistical analysis software package is written in R and is freely available in a package.

scholarly journals PENGARUH PEMBERIAN SENAM LANSIA TERHADAP PENINGKATAN KEBUGARAN DAN FLEKSIBILITAS SERTA KECEPATAN PADA LANSIA DI DESA SIONOM HUDON SELATAN TAHUN 2020

2020 ◽  
Vol 3 (1) ◽  
pp. 21-26
Author(s):  
Siti Sarah Bintang Sarah Bintang ◽  
Novi Wulandari Tinambunan ◽  
Sabirin Berampu ◽  
Miftahul Zannah ◽  
Isidorus Jehaman
Keyword(s):  
Hypothesis Test ◽  
The Elderly ◽  
Rank Test ◽  
P Value ◽  
Functional Balance ◽  
Signed Rank ◽  
Post Test ◽  
Quasi Experimental ◽  
Signed Rank Test ◽  
The Village

The fitness condition of the elderly is an indicator that can be used to determine the health level of the elderly. The level of physical activity is one of the factors that determine body composition from childhood to old age, proper flexibility helps people to have a functional balance throughout their life and to participate fully in countless recreational and communitarian activities. Lack of reasonable flexibility a greater chance of developing lesions and functional problems. Gymnastics for the elderly is a sport that can be done regularly so that the fitness of the elderly can increase. The study was to determine the effect of elderly exercise on improving fitness and flexibility and speed in the elderly in Sionom Hudon Selatan Village in 2020. Method of research is Quasi Experiment or quasi-experimental research with the design or research design used is one group pre and post test conducted in the Village of Sionom Hudon Selatan.The sample consisted of 12 people in each action taken. The results of the hypothesis test with the Wilcoxon signed rank test test p value α = (0.002 <0.05) which means "There is an effect of Giving Elderly Gymnastics Against Improvement of Fitness and Flexibility and Speed in the Elderly in the Village of Zion South Hudon in 2020".

HAEMOSTATIC CHANGES IN CIRRHOSIS AFTER REPEATED DOSES OF DESAMINO D-ARGININE VASOPRESSIN (DDAVP)

1987 ◽  
Author(s):  
A Burroughs ◽  
L Taylor ◽  
D Sprengers ◽  
R A Hatton ◽  
N McIntyre ◽  
...  
Keyword(s):  
Adenosine Diphosphate ◽  
Rank Test ◽  
Paired Data ◽  
Lysis Time ◽  
Signed Rank ◽  
Ristocetin A ◽  
Euglobulin Lysis Time ◽  
Signed Rank Test ◽  
Repeated Doses ◽  
Von Willebrand

Eight patients with stable cirrhosis received DDAVP (0.3ug/kg I. V. of Desmopressin acetate, Ferring Pharmaceuticals) and this dose was repeated after 4h and 24h. Blood for haemostatic studies was collected immediately before and lh after each dose. Results, shown below as medians (expressed in u/dl), with ranges in parentheses, were analysed using the Wilcoxon signed rank test for paired data. One hour after the first dose, von Willebrand factor antigen (VW:ag) and Ristocetin co-factor activity (Ricof) rose from 380 (182-1060) to 502 (230-1000), p<0.01 and from 400 (154-1200) to 494 (180-1600), p<0.01 respectively. This rise was sustained at 4h but increased further lh after the second dose: VW:ag to 540 (305-1000) and Ricof to 570 (420-1150), p<0.01. Levels were significantly above baseline (p<0.01) at 24h but rose again after the third dose: VW:ag to 540 (300-1180), p=<0.01 and Ricof to 479 (277-625). A similar but less marked response was seen in factor VIII:C from 220 (112-300) to 300 (128-360) p= 0.01 at lh, which was maintained up to 4h but not 24h. The rise after the second and third dose was not significant. Multimeric analysis of VWF showed an increase in the very high MW oligomers after DDAVP. Irrespective of the basal value, the euglobulin lysis time shortened consistently after DDAVP and platelet aggregation showed an enhancement with ristocetin, a decrease with adrenaline and no change with adenosine diphosphate and collagen. The bleeding time shortened in half the patients but did not correlate with other changes. We conclude that rises in VW:ag and Ricof are sustained with repeated doses of DDAVP despite the high initial levels in cirrhotics, whereas rises in VIII:C and fibrinolytic activity are transient.

scholarly journals On zeroes in sign and signed rank tests

2019 ◽  
pp. 319-328
Author(s):  
Rajarshi Dey ◽  
Justin Manjourides ◽  
Ronald H Randles
Keyword(s):  
Nonparametric Methods ◽  
Sign Test ◽  
Rank Test ◽  
Rank Tests ◽  
P Values ◽  
Testing Hypotheses ◽  
Signed Rank ◽  
Methods Textbooks ◽  
Signed Rank Test

When zeroes (or ties within pairs) occur in data being analyzed with a sign test or a signed rank test, nonparametric methods textbooks and software consistently recommend that the zeroes be deleted and the data analyzed as though zeroes did not exist. This advice is not consistent with the objectives of the majority of applications. In most settings a better approach would be to view the tests as testing hypotheses about a population median. There are relatively simple p-values available that are consistent with this viewpoint of the tests. These methods produce tests with good properties for testing a different (often more appropriate) set of hypotheses than those addressed by tests that delete the zeroes.

scholarly journals E-Learning Terintegrasi Kearifan Lokal Bali Berbasis 4c pada Mata Pelajaran IPA

2021 ◽  
Vol 4 (3) ◽  
pp. 511
Author(s):  
I Putu Oktap Indrawan ◽  
I Gede Jaka Mahendra
Keyword(s):  
Data Analysis ◽  
Rank Test ◽  
Analysis Model ◽  
Signed Rank ◽  
Wilcoxon Signed Rank Test ◽  
Interactive Data Analysis ◽  
Post Test ◽  
Signed Rank Test ◽  
E Learning ◽  
Interactive Data

Integrasi kearifan lokal dalam e-learning belum dilakukan secara komprehensif. Tujuan penelitian ini adalah untuk mendesain, melakukan uji coba, dan mengevaluasi hasil implementasi e-learning terintegrasi Kearifan Lokal Bali yang komperehensif berbasis 4C. Jenis penelitian yang dipilih adalah Research and Development (R&D) prosedur mengikuti Borg dan Gall. Subjek uji coba adalah 66 siswa pada kelas 8A5 dan 8A10 dengan fokus materi “Struktur dan Fungsi Tumbuhan”. Metode pengambilan data yang digunakan adalah observasi, wawancara, kuesioner dan tes. Data yang terkumpul akan dianalisis secara kualitatif dengan tehnik analisis Interactive data Analysis Model Miles & Huberman dan analisis kuantitatif dengan Wilcoxon Signed Rank Tes. Hasil penelitian menunjukkan desain e-learning sudah mengintegrasi kearifan lokal Bali secara komprehensif serta mengembangkan 4C dengan kualitas masuk kualifikasi sangat baik berdasarkan penilain ahli materi dan e-learning. Hasil uji coba e-learning melalui pengujian Wilcoxon Signed Rank Test menunjukkan ada perbedaan signifikan antara data nilai pre-test dan post-test. Evaluasi e-learning melalui respon siswa dan guru berdasarkan CCAF masuk kriteria sangat baik. Peneliti dan guru dapat menggunakan ini sebagai alternatif model dan melakukan eksperimen dengan mempertimbangkan gaya belajar dan pengukuran detail pada 4C pada siswa.

scholarly journals Robust Tests for the Mean Difference in Paired Data using Jackknife Resampling Technique

2021 ◽  
pp. 3081-3090
Author(s):  
Ghufran A. Ghadhban ◽  
Huda A. Rasheed
Keyword(s):  
Normal Distribution ◽  
Bivariate Normal Distribution ◽  
Rank Test ◽  
Test Statistics ◽  
Paired Data ◽  
Bivariate Normal ◽  
Signed Rank ◽  
Wilcoxon Signed Rank Test ◽  
Signed Rank Test ◽  
Robust Tests

     The paired sample t-test is a type of classical test statistics that is used to test the difference between two means in paired data, but it is not robust against the violation of the normality assumption. In this paper, some alternative robust tests are suggested by combining the Jackknife resampling with each of the Wilcoxon signed-rank test for small sample size and Wilcoxon signed-rank test for large sample size, using normal approximation. The Monte Carlo simulation experiments were employed to study the performance of the test statistics of each of these tests depending on the type one error rates and the power rates of the test statistics. All these tests were applied on different sample sizes generated from three distributions, represented by Bivariate normal distribution, contaminated Bivariate normal distribution, and Bivariate exponential distribution.

PERBEDAAN FINANCIAL PERFORMANCE PASCA SECONDARY OFFERINGS

Wahana ◽  
2019 ◽  
Vol 22 (1) ◽  
pp. 41-49
Author(s):  
Djaja Perdana ◽  
Herbowo Herbowo
Keyword(s):  
Financial Performance ◽  
Stock Exchange ◽  
Hypothesis Test ◽  
Poor Performance ◽  
Rank Test ◽  
Growth Ratio ◽  
Significant Difference ◽  
Before And After ◽  
Signed Rank Test ◽  
Asset Turnover

This study aims to examine the differences in corporate financial performance before and after secondary offerings. The financial performance is proxied by WCR, DER, Solvency, ROA, ROE, Asset Turnover (ATO) and Growth ratio which representing the value of liquidity, financing, activity, performance and growth of the firm. The study involved 67 samples of the companies listed on the Indonesia Stock Exchange conducting secondary offerings during 2008-2013 period and selected through purposive random sampling method and using Financial Statement data from 2005-2016 period. Hypothesis test is performed using Wilcoxon Signed Rank test. The results of this study indicate that there is no significant difference in the ratio of Solvency, ROA and ROE between before and after secondary offerings, but there are significant differences in the ratio of WCR, DER, Asset Turnover and Growth. WCR ratio after secondary offerings increased, while DER ratio after secondary offerings decreased, the condition of both ratios showed better performance. While the indication of poor performance seen in decreasing asset turnover ratio and growth ratio.Keywords : agency theory, financial performance, secondary offerings

PENGARUH TIRAH BARING TERHADAP PENURUNAN RASA MUAL PADA KLIEN GASTRITIS DI PELAYANAN KESEHATAN

2019 ◽  
Vol 3 (1) ◽  
pp. 25
Author(s):  
Dewi Nurhanifah ◽  
Desy Noor Latifah Sari ◽  
Rahmawati Rahmawati
Keyword(s):  
Rank Test ◽  
Purposive Sampling ◽  
Signed Rank ◽  
Wilcoxon Signed Rank Test ◽  
Signed Rank Test

Salah satu masalah kesehatan yang sering dialami adalah penyakit gastritis. Gejala yang sering dikeluhkan oleh penderita gastritis adalah mual. Salah satu penatalaksanaan keperawatan yang dapat mengurangi rasa mual adalah tirah baring. Penelitian ini bertujuan untuk mengetahui pengaruh tirah baring terhadap penurunan rasa mual pada klien gastritis di Pelayanan Kesehatan. Metode penelitian menggunakan eksperimental dengan bentuk penelitian one group pretest-posttest design. Populasi dan sampel adalah klien yang mengalami mual di Wilayah Kerja Puskesmas  yang berjumlah 15 orang. Sampel diambil dengan teknik purposive sampling. Alat pengumpul data menggunakan observasi. Analisa data melalui uji Wilcoxon Signed Rank Test. Hasil penelitian menujukkan klien gastritis sebelum tirah baring mengalami mual ringan sebanyak 7 orang (46,7%), sesudah tirah baring mengalami tidak mual sebanyak 7 orang (46,7%). Ada pengaruh tirah baring terhadap penurunan rasa mual pada klien gastritis di Pelayanan Kesehatan (ρ value = 0,001).

Efektifitas Kompres Jahe Merah Hangat Dan Kompres Serai Terhadap Penurunan Intensitas Nyeri Arthritis Remathoid Pada Lanjut Usia Di Desa Mojoranu Kecamatan Dander Kabupaten Bojonegoro

2017 ◽  
Vol 5 (1) ◽  
Author(s):  
Ferawato Ferawati
Keyword(s):  
Pain Intensity ◽  
Therapy Group ◽  
The Elderly ◽  
Rank Test ◽  
Test Design ◽  
Signed Rank ◽  
Wilcoxon Signed Rank Test ◽  
Post Test ◽  
Signed Rank Test ◽  
Red Ginger

ABSTRAKReumatoid Artritis (RA) merupakan penyakit muscoloskelektal yang sering terjadi pada usia lanjut. Gangguan pada system muscoloskelektal yang ditandai dengan munculnya nyeri sendi dan kekakuan yang mengakibatkan penurunan kemampuan fisiologis atau kualitas hidup lansia. Dampak dari Reumatoid Artritis dapat menimbulkan beberapa keluhan dan dapat menyebabkan kelumpuhan. Untuk menganalisis efektifitas kompres jahe merah hangat dan kompres serai hangat terhadap penurunan intensitas nyeri artitris remauthoid pada lanjut usia.Metode Penelitian: Jenis penelitian adalah quasy experimental dengan two group pre – post test design. Subjek adalah sebagian lansia yang penderita Arthritis Remathoid di Desa Sumberagung Kecamatan Dander Kabupaten Bojonegoro. Subjek dibagi menjadi dua kelompok yaitu kelompok I (n=15) diberi perlakuan kompres jahe hangat dan II (n=15) diberi perlakuan kompres serai hangat. Analisis yang digunakan uji Mann Whitney U Test dan Wilcoxon Signed Ranks Test dengan ingkat kemaknaan α = 0,05.Hasil uji Wilcoxon Signed Rank Test, didapat keduanya mempunyai nilai kemaknaan yaitu ρ value = 0,000. Nilai ρ = 0,031 pada kelompok kompres serai hangat dan kelompok kompres jahe merah ρ value = 0,165. Hasil uji Mann Withney U Test pada Post perlakuan kedua terapi diperoleh selisih nilai nyeri pada kompres jahe ρ= 0,003 dan selisih nilai nyeri kompres serai ρ value = 0,001.Penggunaan kompres jahe merah lebih efektif dibandingkan dengan kompres serai terhadap penurunan intensitas nyeri arthritis remathoid. Kata Kunci: usia lanjut, Reumatoid Artritis (RA), jahe merah, serai, perbedaan efektifitas.    ABSTRACTReumatoid Artritis (RA) is a musculoskeletal which frequently occurs in the elderly. The disorders in the musculoskeletal system are noted by the occurrence of pain in the joints and stiffness which reduces the physiological abilities or life quality of the elderly. The disease causes many such complaints and  consequences of the disease rheumatoid arthritis may experience paralysis. The aims of this study is to analyze the effect of warm red ginger compress therapy and warm lemongrass compress therapy against of  Decreased pain intensity in  the elderly  with  artitris remauthoid. The study was Queasy experimental with two group pre – post test design. Subjects were some elderly people with Arthritis Remathoid in Sumberagung Village, Dander Sub District, Bojonegoro District. Subjects were divided into two groups: group I (n-15) with warm ginger compress therapy, and II (n=15) with warm lemongrass compress therapy. The analyses used in this study were the Mann Whitney U Test and Wilcoxon Signed Ranks Test with α of 0.05. Results of Wilcoxon Signed Rank Test obtained Both have meaning p value of  0.000. ρ value = 0,031 in a warm lemongrass compress therapy group and obtained of warm ginger compress therapy group ρ value = 0,165. The results of Mann Withney U Test on Post treatment second therapy, obtained difference of warm ginger compress therapy with ρ value= 0,003 and difference of warm lemongrass compress therapy with ρ value = 0,001.The use of warm ginger compresses therapy are more effective than a warm lemongrass compress therapy against decreased pain intensity in  the elderly  with  artitris remauthoid.  Keywords: elderly, artitris remauthoid, red ginger, lemongrass, differences in effectiveness

The Degree of Subjective Complaints of Students Practice in Mechanical Technology Laboratories

2018 ◽  
Vol 4 (1) ◽  
pp. 22
Author(s):  
I Ketut Widana
Keyword(s):  
Engineering Students ◽  
Standing Position ◽  
Statistical Test ◽  
Rank Test ◽  
Cross Sectional ◽  
Signed Rank ◽  
Before And After ◽  
Signed Rank Test ◽  
The Difference ◽  
Paired T Test

The working practice of the engineering students is part of the learning process that is irreducible and indispensable. The composition of  lecturing between theoretical and practical one is 40% to 60%. With this condition, the students spend more time at the laboratory. Generally, the students perform in the laboratory work by standing position. The design of research is observational cross-sectional. The method applied is observation, interview and measuring. The subjects of research are practicing students amounting to 21 students. Referring to the analysis of statistical test or Wilcoxon signed ranks test, the difference of effect of work position is significant, namely p < 0.05 towards musculoskeletal disorders (MSDs) before and after working. The quantity of the average complaint after working is score 44.62 ± 9.47. The result of Wilcoxon signed rank test shows that there is significant different effects of standing work position, namely p < 0.05 towards fatigue generally before and after working. The degree of the working pulse is on the average of 110.78  ± 17.80 bpm (beats per minutes) which can be categorized into the medium workload. Using paired t-test, the result is p < 0.05.

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