• The Korean Journal of Health Service Management
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• v.8 no.3
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• pp.207-218
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• 2014

This study was to compare the recognition of future career and nurse's characteristics according to nursing school system. This study was based on cross sectional descriptive method. The data were analyzed by $x^2$-test, t-test, and ANOVA using PASW WIN 18.0 program. The data represented that students who were doing associated degrees or bachelor degrees, showed the similar level recognition of future career and nurse's characteristics. However they showed differences in recognition of the career where they could create and new things(t=2.933, p=.004) and working part time(t=2.328, p=.021). In regards to recognition of nurse's characteristics bachelor degrees students had higher professional ethics($4.59{\pm}.44$). This study proposed that these research results could be used for improving methodology of nursing education.

• Korean Journal of Hospice Care
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• v.6 no.2
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• pp.19-34
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• 2006

The purpose of this study was to confirm the influence of nursing student's values on attitudes toward death of them. The subjects for this study was based 356 students of high school in Gwang Ju. The data were analyzed by using descriptive statistics, reliability, factor analysis, t-test, one -way ANOVA, scheffe, Pearson's correlation coefficient and Stepwise Multiple Regression. The results obtained were as follows : 1. The mean score for values was 24.31 The mean score for attitudes of death was 34.02 2. There was significant differences of attitudes of death according to religion, socioeconomic state, existence of parent, grades, smoking, alcohol intaking 3. There was a positive correlation that is values and attitudes toward death of nursing student. 4. There was a significant predictors influencing attitudes toward death of nursing students were values and alcohol intaking and these predictors accounted for 18.2% of attitudes toward death of them.

• The Journal of Korean Academic Society of Nursing Education
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• v.19 no.4
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• pp.487-497
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• 2013

Purpose: The purpose of this study was to develop a rubric for simulation education and to evaluate this rubric's effect on academic achievement of nursing students. Methods: The rubric was developed through nursing expert's and student's negotiation. Content validity was verified. The participants were 144 undergraduate nursing students recruited from the one university in G city. The participants were given the simulation education for 15 weeks from July, 2011 through December, 2012.[LAB1] The rubric was presented to the experimental group before the course began but was not presented to the control group. The data were analyzed by t-test, $x^2$-test with SPSS win 17.0 program. Results: The simulation education rubric was to improve academic achievement. Looking at the results it significantly improved nursing competence and knowledge. Conclusion: The rubric had a positive effect on academic achievement. A rubric with a high reliability and validity in a number of areas needs to be developed, and there is a need to develop a standardized rubric for simulation education.

• Interdisciplinary Bio Central
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• v.2 no.2
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• pp.4.1-4.6
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• 2010

The most common type of microarray experiment has a simple design using microarray data obtained from two different groups or conditions. A typical method to identify differentially expressed genes (DEGs) between two conditions is the conventional Student's t-test. The t-test is based on the simple estimation of the population variance for a gene using the sample variance of its expression levels. Although empirical Bayes approach improves on the t-statistic by not giving a high rank to genes only because they have a small sample variance, the basic assumption for this is same as the ordinary t-test which is the equality of variances across experimental groups. The t-test and empirical Bayes approach suffer from low statistical power because of the assumption of normal and unimodal distributions for the microarray data analysis. We propose a method to address these problems that is robust to outliers or skewed data, while maintaining the advantages of the classical t-test or modified t-statistics. The resulting data transformation to fit the normality assumption increases the statistical power for identifying DEGs using these statistics.

• The Korean Journal of Health Service Management
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• v.12 no.1
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• pp.149-160
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• 2018

Objectives : The purpose of this study was to examine the mediating effect of professional self-concept on the relationship between professor-student interaction and job-seeking anxiety among nursing students. Methods : A cross-sectional survey was conducted using a convenient sampling method with data collected from a sample of 294 nursing students. The structured questionnaire included items to assess job-seeking anxiety, professional self-concept, and professor-student interaction among nursing students. The data were analyzed with descriptive statistics, t-test, ANOVA, Pearson's correlation coefficient, and multiple regression using the SPSS 24.0 program. Mediation analysis was performed according to the Sobel test. Results : Analysis of the mediating effect of professional self-concept showed a significant mediating influence of professional self-concept on the relationship between professor-student interaction and job-seeking anxiety. Conclusion : The findings suggest that professional self-concept may play a role in increasing the effect of professor-student interaction on job-seeking anxiety. Therefore, this study underscores the need to consider ways of enhancing professional self-concept during interventions for nursing students.

• Journal of Fisheries and Marine Sciences Education
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• v.22 no.1
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• pp.99-112
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• 2010

This study was conducted to test the effect of Burns' cognitive-behavioral group counseling on depression and anxiety of industrial high school students. For this purpose, an experimental group and comparative group which was composed of 15 students respectively were assigned. The independent sample t-test between experimental group and comparative group about the degree of pre-test and after-test and the opposition sample t-test within each experimental group and comparative group were conducted. Analysis of Covariance was also applied. Results of the analyses showed that Burns' cognitive-behavioral group counseling program was effective in decreasing depression and anxiety. Implications of these results on student guidance and counseling were discussed. Suggestions for future research were presented and limitations were indicated.

• Communications for Statistical Applications and Methods
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• v.6 no.3
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• pp.893-900
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• 1999

We use statistical tests which are useful for two-sample problem for detecting edges in gray-level images. An edge is detected by examining changes in gray-level value between adjacent pixel neighborhoods. Some experimental results show that nonparametric detectors such as Mann-Whitney test median test and Kolmogorov-Smirnov test perform effectively in both noisy and noise-free images while parametric T test is sensitive to noise.

• Journal of the Korean Statistical Society
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• v.8 no.1
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• pp.23-36
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• 1979

In the multiple linear regression model a class of weighted least absolute error estimaters, which minimize the sum of weighted absolute residuals, is proposed. It is shown that the weighted least absolute error estimators with Wilcoxon scores are equivalent to the Koul's Wilcoxon type estimator. Therefore, the asymptotic efficiency of the proposed estimator with Wilcoxon scores relative to the least squares estimator is the same as the Pitman efficiency of the Wilcoxon test relative to the Student's t-test. To find the estimates the iterative weighted least squares method suggested by Schlossmacher is applicable.

• Asian Pacific Journal of Cancer Prevention
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• v.17 no.sup3
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• pp.107-111
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• 2016

This study aimed to determine sleep disorders and associated risk factors in leukemia patients undergoing chemotherapy in Imam Khomeini Hospital of Sari, Iran. This cross-sectional study was conducted in 2015 with 100 patients selected. Inclusion criteria included complete mental and psychological health and being over 18 years old, and exclusion criteria included suffering other cancers, other chronic diseases, concurrent radiotherapy, and chemotherapy. The Pittsburgh Sleep Quality standard questionnaire was used to collect data. The questionnaire consisted of mental sleep quality, sleep latency, sleep duration, sleep quality, sleep disturbances, use of sleeping drugs, and impaired daily functioning. Data were analyzed by software SPSS 18 and by using descriptive and inferential tests (Pearson, Spearman, T-test and chi-square). Totals of 47 men (47%) and 53 women (53%) with a mean age of $44.1{\pm}1.7$, participated in the study. The mean overall score of sleep quality was $9.3{\pm}3.9$, which represents the average sleep quality in most participants. T-test shows that males have better sleep quality than females (t=2.1; 95%CI:0.004-0.25; P<0.01). Also the sleep quality increased with age (r=0.22, P=0.03). Results show that the amount of sleep quality was only moderate in most patients, so it is necessary to take coping strategies to improve their quality of sleep.

• The Journal of Asian Finance, Economics and Business
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• v.7 no.8
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• pp.723-733
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• 2020

The study investigates the effects of online instructional facilitator's qualities on student performance of online class activities. The study explores the roles of instructional facilitators who may influence student performance of online class activities and their academic achievement. The study employs a set of aggregated data from 1,362 subjects and 10 facilitators who participated in multiple online classes. The results of independent samples t-test reveal that the student performance in online classes has no association with facilitators' educational background or academic degree, as well as demographic characteristics, student evaluation records and instructional achievement. The results of multiple regression analysis show that the facilitator engagement has a positive relation to the enhancement of student interaction, reading discussion messages, and the quality of discussion messages in online discussions. The results of correlation analysis show that the facilitator engagement has a positive impact on both increasing the number of reading discussion messages and enhancing the quality of discussion messages. The facilitator engagement increases the quantity of reading discussion postings and enhances the quality of discussion messages, which would be a substantial contribution to student performance by facilitators. The findings suggest that student performance and academic achievement in online classes are not independent of facilitator engagement.