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Showing 1 to 20 of 52 for “"Mann-Whitney Test"”.
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Statistical analysis of end-points in cancer clinical trials
… trials found the most common statistical test in use to be a Chi squared test of the total response rate, but a total of 21 different statistical methods were used. The various statistical tests available are reviewed, including the Mann-Whitney test and the Chi squared test for trend …
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Evaluating and Changing Postoperative Opioid Prescribing After Routine Pediatric Surgery
… was performed using Chi-square, Fisher’s Exact, Mann Whitney test, and univariate and multivariable logistic regression analyses. Initial review of 5,458 children operated on by 23 pediatric surgeons, demonstrated that 36% (n=1973) of patients received an opioid prescription at discharge. …
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An exploration of the impact of working individually versus working collectively on stress and performance
… and individual stress. Analysis using the Mann-Whitney test revealed a significant effect found on performance by subject grouping.</p>
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The effect of a state department of education mentoring program for teachers on science student achievement
… on student achievement on science standardized tests. This study analyzed the impact this program has had on student achievement in participating high schools when compared with high schools across the state where the program had not intervened. The Georgia High School Graduation Test, physical …
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The presence of tranquil sounds in relation to augmented focus and concentration
… Emotion Survey and Personal Habits Survey. The Mann-Whitney test was used to compare the scores of those who prefer silent or prefer sounds in the environment to their scores on the Personal Emotional Survey. As we have found from past studies, music plays an important role in emotions, verbal …
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Enhancing Weight Gain in Long-Term Care Residents at Risk for Weight Loss through Protein and Calorie Fortification.
… 4.8 lbs of body weight in the same period. The Mann-Whitney Test was used to determine if the weight changes were significantly different between groups. Analysis indicated that (p-value = 0.2550) there was no significant difference in body weight gain between the groups. A larger sample size …
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Comparative analysis of parametric, nonparametric and permutation methods for differential expression
… technology has resulted in a number of tests being proposed to detect differentials expression. The purpose of study is to compare the parametric, non parametric and permutation tests when applied to microarray data for differential expression analysis. t test (parametric), Mann Whitney …
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Critical Issues in the Processing of cDNA Microarray Images
… the Seeded Region Growing Algorithm and the Mann-Whitney Test, are examined. We present limitations of these techniques. Finally, we studied the data extraction method used in MicroArray Suite (MS), a microarray analysis software, via synthetic images and explain its intricacies.
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Medication's effect on classified students' self-esteem and academic performance
… were analyzed using an independent samples t-test and a Mann-Whitney test, within subjects. The results from each test were compared to the standard BYI scores and average age appropriate academic grades to demonstrate the differences seen in special education students. Results indicated that, …
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College students' achievement and understanding of experimental and theoretical probability : the role of tasks
… A mixed methods design that utilized a pre-test and post-test was used. This included treatment and control groups, each comprised of students in three sections of an introductory statistics course taught by the researcher at a college in Cyprus. During the study, students in the treatment …
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Platelet Function in Dogs with Chronic Liver Disease
… assessment with sonography. An unpaired t-test was used for normally distributed data and the Mann-Whitney test was used when non-Gaussian distribution was present. The level of significance was set at P <0.05. Results: The CT was not different between the two groups (P = 0.27). The BMBT …
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A Pilot Study To Determine The Value Of Bilingual Counseling In A High School Where The Student Population Is Predominately Spanish/english Bilingual
… very strong evidence of reliability. A t-test was conducted to determine if there was a statistically significant difference between student vs. parents on lack of English. The result was not statistically significant. The nonparametric Mann-Whitney test was also conducted. Here, too, the …
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Analysis of Customers’ Satisfaction With Banking Services: A Case Of Standard Chartered Bank
… was analyzed by using descriptive analysis. Mann-Whitney test was applied to compare satisfaction levels between satisfied and dissatisfied customers. Results show that majority of the customers were satisfied with the Standard Chartered Bank. Non-parametric results show that customers were …
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A Study Of Retention Rates Among Non-Resident Students Enrolled In Freshman Retention Programs
… The researcher conducted a Kruskal-Wallis test, Mann-Whitney test, and two-way chi-square tests to determine the relationship between enrollment and retention of non-resident, undergraduate students enrolled in the fye courses, which was juxtaposed with data on non-resident students in the …
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Dividend tax changes and ex-dividend behaviour: the case of South Africa
… before and after the April 2012 Act using a t-test and Wilcoxon Mann Whitney test respectively. Furthermore, this study employs a fixed effects regression model to analyse the PDR change on the ex-dividend day before and after the April 2012 Act. The advantage of using a fixed effects model is …
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Vilniaus universiteto studentų požiūrio į maisto priedus tyrimas ir vertinimas /
… Word 2007. To verify hypotheses chi-square test, Mann Whitney test and Kruskal-Wallis test were calculated. The null hypotheses is rejected when p<0,05. The results. There is not enough information about food additives for 39 % of students. 97 % of women and 87 % of men know that food …
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Quantifying Rates of Autocompaction in the Pearl River Marsh, Louisiana
… their sedimentary properties were statistically tested for significant differences using the non-parametric Mann-Whitney test. Rates of autocompaction were calculated from the model of Williams (2003), and both rates of autocompaction and sedimentation were tested for significant differences …
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Analysis of Two-Year College Presidents' Ranking of the American Association of Community Colleges' Leadership Competencies
… the researcher used the Wilcoxon signed ranks test to determine where the differences were located. The major finding indicated that organizational strategy is relatively more important than resource management, communication, collaboration, and professionalism in the current role of leading …
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Mechanical Behavior of Posterior Implant Supported Restorations
… samples were loaded to fracture in a universal testing machine. Data was recorded, tabulated and analyzed. For the fatigue loading test, Fisher exact test. was used to study the effect of material and design on the fatigue resistance of different implant supported restorations. Test for data …
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The relationship between corporate social responsibility and financial performance: evidence from the Johannesburg stock exchange
… estate sector. The results of the nonparametric (Mann-Whitney) tests show that companies that are part of the FTSE/JSE Responsible Investment Index perform better on average than those that are not included in the index. This conclusion is based on a review of the total return index (TRI), return …
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