• Communications for Statistical Applications and Methods
• /
• v.9 no.3
• /
• pp.877-887
• /
• 2002

In this paper, behaviors and properties of p-values for goodness-of-fit test are investigated. With some findings on the p-values, we consider some applications to determine sample size of a survey research using the regression equation based on a pilot study data. Regression equations are obtained by the well-known least squared method, and we find that regression lines could be formulated with only two data points, alternatively. For further studies, this works might be extended to t distributions for testing hypotheses about population mean in order to determine sample size of a prospective study. Also similar arguments could be explored for F test statistics.

• Journal of Korean Academy of Nursing
• /
• v.32 no.1
• /
• pp.16-27
• /
• 2002

This study was conducted to develop and test the hypothetical model which explains smoking cessation behavior was established based on the Triandis' interpersonal behavior theory. Method: The data were collected from the 400 university student smokers enrolled in the universities located in Seoul and Kyung-In province. The study was analyzed by path analysis with LIESREL 8 program. Results: All of the fit statistics, except the Chi-square value, it showed the hypothetical model was well fitted to the data. Benefit, affect, and social influences related to smoking cessation behavior had significant direct effect on intention to smoking cessation as shown in the study of the hypothetical model. Perceived barrier and the physiologic arousal related to smoking cessation had significant direct effects on performing smoking cessation behavior, whereas numbers of previous attempts to quit smoking and intention to smoking cessation did not.

• Research in Community and Public Health Nursing
• /
• v.19 no.3
• /
• pp.450-458
• /
• 2008

Purpose: This study was done to investigate the relationship between the type of gender role identity and home environmental variables. Method: This study used a descriptive survey design and convenience sampling. Data were collected through self report questionnaires from 1,497 female high school students in Seoul. The data were analyzed by the SPSS 10.0 program, which included frequency, percentage, mean, standard deviation, chi square test, ANOVA, and Duncan test. Results: The androgyny gender role identity was most common (33.9%). The type of gender role identity had a significant correlation with home environmental variables (economic status, relationship with parents, father's education level, mother's education level. noninterference, reasonable guidance, affection, overprotection, achievement, active involvement, limit setting). Conclusion: It is necessary to provide parent education programs to help female adolescents develop gender role identity toward androgyny.

• The Journal of the Korean dental association
• /
• v.54 no.5
• /
• pp.356-364
• /
• 2016

Aim: The purpose of this study was to identify dominant pathogens and their antimicrobial susceptibilities of endodontic infection in type II diabetes mellitus (DM) patients to determine effective empirical antibiotics. Methodology: Pathogens from endodontic infection in six patients with DM and in six patients without DM were cultured, identified and their antimicrobial susceptibility was tested using Vitek2 systems ($bioM{\acute{e}}rieux$, Marcy l' Etoile, France). The results were analyzed using Chi-square test and Fisher's exact test at P< 0.05 level. Results: Pathogens of opportunistic infection were dominant in DM patients (P=0.015). However, there was no significant difference of antimicrobial susceptibility between DM and non-DM patients. Relatively high percent (27%) of pathogens showed resistance to penicillin. Conclusions: More cautions should be paid to DM patients because they are prone to opportunistic infection. Penicillin is not effective in the control of endodontic infection.

• Journal of the Korean Home Economics Association
• /
• v.35 no.6
• /
• pp.143-155
• /
• 1997

The purpose of this study is to compare the differences of clothing behavior by the level of self-monitoring under given social situations. The result of this study is drown from the analysis of the survey, gathered from the 522 female students of universities reside in Seoul, by using the method of convenience sampling. The statistical methods used to test the data were MANOVA and chi-square test. The results of this study can be summarized s follows; first, as a result of analyzing the differences of situational self-image pursuits among situations depending individual's self-monitoring levels, it was found that the pursuits changes among situations regardless of the self-monitoring levels. Thus, this hypothesis could not be verified. Second, as a result of analyzing the changes of priority of clothing selection factors among situations depending on individual's self-monitoring levels, it was found that the priority factors changed among situations regardless of the self-monitoring levels.

• The Journal of Korean Academy of Orthopedic Manual Physical Therapy
• /
• v.18 no.1
• /
• pp.19-29
• /
• 2012

Background: This study was conducted to investigate subjective musculoskeletal symptom and the related factor of caregiver. Methods: For 300 caregiver, we used the self-administered questionnaires to examine occupational stress and subjective musculoskeletal symptom designed by KOSHA. The collected data were analyzed chi-square test, independent t-test and multiple logistic regression analysis using SPSS 12.0. Results: The multiple logistic regression analysis showed that the caregiver working in the general hospital significantly increased the subjective musculoskeletal symptom in their neck, shoulder, hand/wrist/finger, back, leg/foot. For the caregiver working in hospital showed significantly increased the subjective musculoskeletal symptom in their hand/wrist/finger and leg/foot. Conclusions: With the above results, continuous and systematic prevention program should be established, which include the ergonomics and psychosocial factor for the caregiver's musculoskeletal symptom.

• Proceedings of the Korean Statistical Society Conference
• /
• 2000.11a
• /
• pp.33-38
• /
• 2000

Krishnamoorphy and Raghavarao(1993) invented exact binomial and asymptotically normal test procedures for truthful answering in the repeated randomized response models under the assumption that two repeated response measures are independent. Under the same assumption, Lakshmi and Raghavarao(1992) suggested asymptotic chi-square test for respondents' truthful answering in the same models. In this article we detect the factors and the conditions with which two response variables might be independent, and find the condition for independence in the repeated randomized response models with considering untruthful answer. But, the condition of independence make the randomized model no meaning. Under the assumption of conditional independence between two response variables, we can apply the same logical statements on deriving the tests for truthful answering in the repeated randomized response models as in Krishnamoorphy and Raghavarao(1993).

• Communications for Statistical Applications and Methods
• /
• v.24 no.3
• /
• pp.303-315
• /
• 2017

Yoo (2015, Statistics and Probability Letters, 99, 109-113) derives theoretical results in an optimal sufficient dimension reduction with singular inner-product matrix. The results are promising, but Yoo (2015) only presents one simulation study. So, an evaluation of its practical usefulness is necessary based on numerical studies. This paper studies the asymptotic behaviors of Yoo (2015) through various simulation models and presents a real data example that focuses on ordinary least squares. Intensive numerical studies show that the $x^2$ test by Yoo (2015) outperforms the existing optimal sufficient dimension reduction method. The basis estimation by the former can be theoretically sub-optimal; however, there are no notable differences from that by the latter. This investigation confirms the practical usefulness of Yoo (2015).

• International Journal of Costume and Fashion
• /
• v.11 no.1
• /
• pp.35-52
• /
• 2011

The purpose of this study is to identify the effects of college students' relationship status on their clothing behavior and purchasing process. The subjects of this study were college students. After a survey, 113 questionnaires were used for the data analysis excluding incomplete ones. Factor analysis, paired t-test, Pearson's correlation, one-way ANOVA, MANOVA and Chi-square test were conducted. The data analysis found that female students had higher levels of clothing interest, and fashion-seeking, impulse buying and individuality-seeking motives than male students. Female students who had boyfriends showed particularly higher levels of fashion-seeking and impulse-buying motives. Throughout the clothing purchase process stages, students were most influenced by girlfriend/boyfriend, especially in the evaluation stage. Students who had girlfriends/boyfriends were significantly more influenced by them. Female students were more influenced by parents at the evaluation stage and their female friends at the information search stage.

• Journal of Korean Public Health Nursing
• /
• v.22 no.2
• /
• pp.165-176
• /
• 2008

Purpose: This study was conducted in order to analyze the factors that influence alcohol use disorder in elders in KyongBuk province. The results of the study will provide basic information for the development of nursing interventions to promote proper alcohol use in elders. Methods: The subjects were 626 elderly individuals. Alcohol use disorder was defined as a score of more than 15 point on the AUDIT-K(Korean version of Alcohol Use Identification Test). Descriptive statistics, chi-square test, ANOVA and logistic regression were utilized to analyze the data. Results: Overall incidence of alcohol use disorder level; normal 73.2%, problem drinking 7.5% and alcohol use disorder 19.3%. Significant factors affecting alcohol use disorder were sex (OR=6.897), religious belief (OR=1.836), smoking (OR=2.948), liver disease (OR=4.753) and depression (OR=1.779). Conclusion: Community health care nurses perform a crucial function in the screening of elderly alcoholics. Early detection and treatment of depression in elders may help to prevent alcoholism.