• Title/Summary/Keyword: Comparison Test

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A Study on Goodness-of-fit Test for Density with Unknown Parameters

  • Hang, Changkon;Lee, Minyoung
    • Communications for Statistical Applications and Methods
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    • v.8 no.2
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    • pp.483-497
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    • 2001
  • When one fits a parametric density function to a data set, it is usually advisable to test the goodness of the postulated model. In this paper we study the nonparametric tests for testing the null hypothesis against general alternatives, when the null hypothesis specifies the density function up to unknown parameters. We modify the test statistic which was proposed by the first author and his colleagues. Asymptotic distribution of the modified statistic is derived and its performance is compared with some other tests through simulation.

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Comparison of Resistance of Root Rot Caused by Fusarium solani in Ginseng Breeding Lines (인삼 육성계통의 Fusarium sozani에 의한 근부병 저항성 비교)

  • 천성룡;김홍진
    • Journal of Ginseng Research
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    • v.14 no.1
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    • pp.50-56
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    • 1990
  • Root-rot of ginseng caused by Fusarium solani is one of the most obstacles to ginseng cultivation. We evaluated some inoculating techniques of ginseng with Fusarium solani, for selection of disease resistant breeding lines. The most effective inoculating techniques evaluated were inserting toothpicks colonized by F. solani into the seedling roots in laboratory test and dusting seedlings with vermiculite after dipping in conidial sllspension and then replanting method in field test. The resistance to diseased by F. solani was lines of 82022 and 82066 in laboratory test. 82920-1 and 78093 in field test.

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Proficiency Testing by Inter-Laboratory Comparisons for Braking Lining (제동 라이닝애 대한 시험소간 비교에 의한 숙련도시험)

  • Chung Jong-Duk;Kwon Sung-Tae;Hong Yung-Ki;Kim Won-kyung
    • Proceedings of the KSR Conference
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    • 2003.05a
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    • pp.586-591
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    • 2003
  • This paper describes the result of proficiency testing by inter-laboratory comparisons for braking lining. Proficiency testing provides an objective means of assessing and demonstrating the validity and reliability of test results produced by laboratories. To more accuracy comparison test for braking lining test, they will be made the same test procedure and environment conditions.

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The Effects of Laughing Programs on Elementary Students Anxiety and Self-esteem (웃음프로그램이 초등학생의 불안과 자아존중감에 미치는 효과)

  • Jang, Hyun Sun;Jeong, Sohee
    • The Journal of Korean Society for School & Community Health Education
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    • v.16 no.2
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    • pp.101-114
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    • 2015
  • Objectives: Find out how it affects anxiety situations and self-esteem targeting the critical period of development of self-esteem in the lower grades in elementary school based on laughter therapy in having a positive influence on physical health promotion and positive emotional cultivation. And to verify the effects of laughter activity was to provide preliminary data on mental health education and guidance of school life. Methods: By targeting Ulsan Y elementary school, second grade 7 class, 191 students conducted test self-esteem and anxiety. Homogeneous group of experimental and control groups were selected in each one class. Classified as experimental group carried out laughter activity programs and control group did not carried out. Also the separation of the application program before and after, then it were performed preliminary-post-further as same checklist. Program coverage period is 12 weeks and 30 minutes per session was conducted twice a week. Differences between the experimental group and the comparison group has conducted the independent samples t-test, and if the difference between the experimental group and the comparison group were verified by performing a variance analysis(Oneway ANOVA) and post multiple comparisons. Results: Analysis of the experimental group decreased anxiety in the post-test than the pre-test as a whole, in particular, sub-areas of concern, shame and shyness was shown to be effective, and decision of the difficulty was not significant by insignificant reduction. In addition, self-esteem was increased in overall score. The score of collective self-esteem and School life self-esteem were more increased, and domestic self-esteem was not significant by slight increases. In contrast, the comparison group showed no significant difference in all areas of anxiety and self-esteem of pre-test and post-test. Conclusions: In experiments on self-esteem and anxiety of lower grade in elementary school through laughter activity program, comparison group it did not show an effect by accident, and experimental group showed meaningful effects that self-esteem was increased and anxiety was reduced. Thus, laughter activity can be seen that improving self-esteem, anxiety reduction and etc, is very beneficial to mental health.

Statistical Errors of Articles Published in the Journal of Oriental Rehabilitation Medicine(I) (한방재활의학과학회지의 통계적 오류에 관한 고찰(I))

  • Park, Tae-Yong;Heo, Tae-Young;Shin, Byung-Cheul
    • Journal of Korean Medicine Rehabilitation
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    • v.20 no.4
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    • pp.105-130
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    • 2010
  • Objectives : The purpose of this study was to assess the statistical methods errors used in the journal of Oriental Rehabilitation Medicine(JORM) and to identify the types of errors in statistical analysis. Methods : We reviewed quantitative articles that were published in the JORM from January 2005 through October 2009. Those were not used by statistical analysis such as literature studies, case study, review articles were not included in this analysis. A total of 296 articles was reviewed. We evaluated the adequacy and the validity of the statistical techniques with our checklist established be modified Lee's checklist, and three statistical evaluators assessed together to minimize bias. Results : Of the 222 articles, 213 were used in inferential and descriptive statistics. Of those 80% of articles adopting descriptive and inferential statistics were detected having statistical errors. One articles used 1.7 statistical method unit generally. Most frequently employed statistics were student t-test, one way ANOVA. pearson correlation analysis, Mann-whitney U test, paired t-test, and chi-square test in their order. However, most frequent statistics having errors were similar in order. The most common statistic errors were as follow: 1. absence of normality test, 2. misuse between paired test and unpaired test, 3. wrong choice of repeated measures analysis without consideration of time variables, 4, increase of Type I error by using inappropriate multiple test, 5. inappropriate application of discrete or categorical data instead of continuous data in correlation analysis, 6. poor consideration of basic consumption in chi-square test, 7. confusion between frequency comparison and average comparison, 8. mentioning the statistical technique without using it. Conclusions : We found various mistake or misuses in the applications of statistical methodologies in the articles published in the JORM. Careful consideration of statistical use and review from the specialist of statistics are warranted for improving the quality of JORM.

Clinical Usefulness of M-test on Patients with Chronic Neck Pain: A Single Arm Pre-post Comparison Study (M-test에 근거한 만성 경항통 환자의 진단 및 치료: 전후비교 임상연구)

  • Cho, Woo-Young;Chung, Seok-Hee
    • Journal of Korean Medicine Rehabilitation
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    • v.26 no.4
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    • pp.67-75
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    • 2016
  • Objectives The purpose of this study was to investigate the clinical usefulness of M-test (Meridian test) as an adjunctive evaluation and treatment in patients with chronic neck pain. Methods This study was a single arm pre-post comparison study. Thirty-six eligible subjects with chronic neck pain were recruited from August to September, 2015. M-test was used for evaluating the condition of meridian, which can induce the limitation of ROM and body discomfort. Subjects were offered intradermal acupuncture treatment on one-acupoint for 48 hours. Cervical numeric rating scale (NRS), cervical range of motion (ROM), neck disability index (NDI) and surface electromyography (SEMG) were measured before and after the treatment. Total NRS and the number of movement limitation of M-test were also measured before and after the treatment. Results Among the 36 participating subjects, 4 subjects were lost to follow-up or excluded in accordance with the criteria. Significant differences on Cervical NRS and NDI were found after the treatment (p<0.001). There was a significant difference in the range of left cervical rotation (p<0.05). Root mean square (RMS) of SEMG significantly decreased on the right sternocleidomastoid muscle (p<0.05), but significantly increased on the right trapezius muscle (p<0.05). Median frequency (MdF) of SEMG significantly increased on both sternocleidomastoid muscles. There appears to be significant differences after the treatment in total NRS and the number of movement limitation of M-test (p<0.05). Conclusions These results suggest that the evaluation and treatment of M-test based on the meridian and collateral theory were effective on cervical NRS and NDI, and also improved the movability of human body.

Stroke Recovery Can be Enhanced by using Repetitive Transcranial Magnetic Stimulation Combined with Mirror Therapy

  • Ji, Sang-Goo;Cha, Hyun-Gyu;Kim, Myoung-Kwon
    • Journal of Magnetics
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    • v.19 no.1
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    • pp.28-31
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    • 2014
  • The aim of the present study was to examine whether mirror therapy, in conjunction with repetitive transcranial magnetic stimulation (rTMS), can improve the upper extremity function of stroke patient. This study was conducted with 35 subjects, who were diagnosed as a hemiparesis by stroke. The Mirror plus rTMS group was of 12 members who undertook mirror therapy in conjunction with rTMS, the Mirror group was of 11 members who undertook mirror therapy, and the control group was of 12 members who undertook sham therapy. A motor cortex excitability was performed by motor evoked potential, and upper limb function was evaluated by Fugl-Meyer Assessment, and Box and Block Test. Significant difference was shown after the experiment, in comparison of the groups in terms of latency, and as the result of post hoc test, significant difference was shown between the Mirror plus rTMS group and control group, and between the Mirror group and control group, respectively. Significant difference was shown after the experiment in comparison of the groups in amplitude, and as the result of post hoc test, significant difference was shown between the Mirror plus rTMS group and Mirror group, and between the Mirror plus rTMS group and control group. Significant difference was shown after the experiment, in comparison of the groups in FMA and BBT, and as the result of post hoc test, significant difference was shown between the Mirror plus rTMS group and Mirror group, and between the Mirror group and control group. The study showed that mirror therapy in conjunction with rTMS is more effective to improve upper extremity function, than mirror therapy and sham therapy.

Impact of the Independent Occupational Health Nursing Course to the Role Orientation of Baccalaureate Nursing Students (산업간호교육과정이 간호학생의 산업간호사에 대한 역할인식에 미치는 영향)

  • June, Kyung-Ja;Yi, Ggod-Me
    • The Journal of Korean Academic Society of Nursing Education
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    • v.6 no.1
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    • pp.92-102
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    • 2000
  • Social trends influence the need for inclusion of basic concepts of occupational health into generic nursing education. Several techniques have been used to incorporate occupational health into baccalaureate programme. These include clinical preceptorships in employee health services, lectures on occupational health issues into community health nursing courses and the integration of occupational health concepts throughout the nursing curriculum and organize an independent course of occupational health nursing for two semester hours. The purpose of this study was to examine the impact of this course to the role orientation of nursing students. In March 1998, pre-test was conducted with all 39 students. Post- test for the subjects and the survey for the other comparison group were conducted after the course in May. Structured questionnaires were distributed which were composed of 42 items related to the role of occupational health nurse and each item was measured on a scale of 1 to 5. Results are as follows: 1) The paired t-test supported the hypothesis that role orientation of students was improved through the occupational health nursing course (t=-3.93, p=.000), 2) As the result of t-test between the subject and the comparison group, the mean score of the role orientation in the case of subject was significantly higher than that of the comparison group(t=13.3449, p=.0005). The enlargement of occupational health nursing course must be a facilitating factor to the improvement of the role orientation of baccalaureate students. It is needed to measure occupational health nursing competence of them in the future.

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