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About 10,000 papers for “multiple comparisons”

Multiple comparisons

Malachy O. Columb, S. Sagadai · Current Anaesthesia and Critical Care · 2006

Cited by 29

multiple comparisons

Pan, Wei, Song, Xingyu, Hu, Qibo et al. · Figshare · 2022

supplementary files-multiple comparisons

Cited by 0Open access

Multiple Comparisons

2013

Performing all of the possible t tests becomes more problematic as the number of conditions or groups increases. To understand the main drawback of performing multiple t tests, consider an example of a multigroup study in which the null hypothesis could reasonably be true. Protected t tests can be calculated using multiple formulas, but first students need some pieces of information from the ANOVA. A number of testing schemes have been devised to increase the power associated with the Bonferroni adjustment, while maintaining its flexibility and strict control over the experiment wise alpha. One of the simplest of these improves upon the inequality that forms the very basis of the Bonferroni test. Holm demonstrated that students could add considerable power to their Bonferroni test with a simple step-down procedure.

Cited by 0

Multiple comparisons.

Sohni Siddiqui (15368790), Anja Schultze-Krumbholz (10789514) · Figshare · 2023

<div><p>Increasing reports of bullying and cyberbullying in schools in recent years are undeniable and have been recognized as a serious public health problem. Conventional bullying and cyberbullying are not only a problem in higher educational institutions in Pakistan, but also in primary and secondary schools. Although statistics show higher levels of bullying and cyber-risky behaviors among youth, policies and interventions to control the consequences of conventional and cyberbullying are rare in the Pakistani context. This study explores teachers’ perspectives and experiences in identifying bullying strategies in different school contexts. Four hundred fifty-four teachers working in different educational institutions completed an online survey that provided data to draw conclusions and to get a better sense of the situation in educational institutions in Pakistan. According to the results, teachers experience verbal and social bullying more frequently than online and physical bullying. In addition, teachers in lower grades reported noticing more physical bullying than teachers in higher grades. Facebook was reported to be the most common platform students used to bully each other. Researchers also found significant differences between rural and urban teachers’ experiences with social bullying. Bullying intervention strategies should be developed and integrated into educational settings in Pakistan. The data presented will be used to develop tailored anti-bullying interventions that are culturally and socially appropriate for Pakistani educational settings.</p></div>

Cited by 0Open access

Multiple Comparisons.

Zhen Li (49109), Chang Wang (328274), Rui Fu (327741) et al. · Figshare · 2020

Cited by 2Open access

Multiple Comparisons

Rand R. Wilcox · 2009

Abstract There is, however, a technical issue that needs to be taken into account. Suppose there are no differences among the groups, in which case none of the six null hypotheses just listed should be rejected. To keep things simple for the moment, assume all four groups have normal distributions with equal variances, in which case Student’s t-test in chapter 9 provides exact control over the probability of a Type I error when testing any single hypothesis.

Cited by 0

Multiple comparisons.

Zafar Ali (1500811), Hashaam Bin Ghafoor (18605214), Muhammad Nasir Ayub Khan (11815300) et al. · Figshare · 2024

<div><p>Evaluating educational climate (EC) is imperative for ensuring postgraduate trainees’ competencies and quality in residency training programs. This study assessed the EC experiences of pathology postgraduate residents (PGRs) during their postgraduate training in pathology residency programs—a cross-sectional study design assigned EC scores in the pathology residency program at a prestigious institution in Islamabad, which were measured using the Dutch Residency Educational Climate Test (D-RECT) questionnaire. Scores from the D-RECT were employed to conduct descriptive statistics and comparison of means across groups to evaluate EC scores by years of training and compared to assess where the differences were located. Among FCPS-II pathology residents, most of whom were females (94.4%), the mean age was 28.11±2.91 years. A mean positive score was observed among all pathology residents (<i>M≥</i>3.6) for all D-RECT subscales except for the feedback subscale: the average score for feedback was below the average mean score of 3.6 (<i>M</i> = 3.19). A significant difference <i>p</i> = 0.016 was observed in EC scores across different groups through the Analysis of Variances (ANOVA) test. The most significant difference was between less than two and greater than two groups <i>p</i> = 0.027, followed by the difference between equal to two groups and greater than two groups <i>p</i> = 0.052. Overall, positive scores for EC in the pathology residency program were observed. Thus, targeted interventions are needed to increase feedback scores and address observed differences in EC scores by years of training.</p></div>

Cited by 0Open access

multiple comparisons

Wei Pan, Xingyu Song, Qibo Hu et al. · Figshare · 2022

supplementary files-multiple comparisons

Cited by 0Open access

Multiple comparisons.

Ranbing Yang (17319710), Wenjian Xu (479291), Zhiguo Pan (12097477) et al. · Figshare · 2025

<div> Aiming at the problems of high working resistance and high energy consumption in potato crop harvesting in sticky soil, this paper designs a potato bionic drag-reducing digging shovel based on the streamline shape of catfish head. Based on the theoretical analysis and discrete element method (DEM) simulation, the main factors affecting the digging resistance are the angle of entry, forward speed and vibration frequency, and the digging resistance increases with the increase of forward speed, and decreases with the increase of vibration frequency. Through the orthogonal test in the field, the optimal working parameters of the drag reduction performance are determined with the digging resistance as the test index, and the comparative test of the different shovel shapes is carried out with this parameter. The results show that the optimal solution is to use bionic shovel, with an entry angle of 15°, an operating speed of 0.27m/s, and a vibration frequency of 6Hz. The average digging resistance of the bionic shovel is 3612.86N, and the bionic digging shovel reduces resistance by 17.76% relative to an ordinary flat shovel, and 21.09% relative to the plane triangle shovel. The effect of drag reduction is remarkable, and the structure of the digging shovel bionic is reasonable, which can satisfy the requirements of resistance reduction and consumption reduction of potato harvesting under the conditions of sticky and heavy soils. </div>

Cited by 0Open access