• 제목/요약/키워드: SAS method

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Study on the analysis of disproportionate data and hypothesis testing (불균형 자료 분석과 가설 검정에 관한 연구)

  • 장석환;송규문;김장한
    • The Korean Journal of Applied Statistics
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    • v.5 no.2
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    • pp.243-254
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    • 1992
  • In the present study two sets of unbalanced two-way cross-classification data with and without empty cell(s) were used to evaluate empirically the various sums of squares in the analysis of variance table. Searle(1977) and Searle et.al.(1981) developed a method of computing R($\alpha$\mid$\mu, \beta$) and R($\beta$\mid$\mu, \alpha$) by the use of partitioned matrix of X'X for the model of no interaction, interchanging the columns of X in order of $\alpha, \mu, \beta$ and accordingly the elements in b. An alternative way of computing R($\alpha$\mid$\mu, \beta$), R($\beta$\mid$\mu, \alpha$) and R($\gamma$\mid$\mu, \alpha, \beta$) without interchanging the columns of X has been found by means of,$(X'X)^-$ derived, using $W_2 = Z_2Z_2-Z_2Z_1(Z_1Z_1)^-Z_1Z_2$. It is true that $R(\alpha$\mid$\mu,\beta,\gamma)\Sigma = SSA_W and R(\beta$\mid$\mu,\alpha,\gamma)\Sigma = SSB_W$ where $SSA_W$ and means analysis and $R(\gamma$\mid$\mu,\alpha,\beta) = R(\gamma$\mid$\mu,\alpha,\beta)\Sigma$ for the data without empty cell, but not for the data with empty cell(s). It is also noticed that for the datd with empty cells under W - restrictions $R(\alpha$\mid$\mu,\beta,\gamma)_W = R(\mu,\alpha,\beta,\gamma)_W - R(\mu,\alpha,\beta,\gamma)_W = R(\alpha$\mid$\mu) and R(\beta$\mid$\mu,\alpha,\gamma)_W = R(\mu,\alpha,\beta,\gamma)_W - R(\mu,\alpha,\beta,\gamma)_W = R(\beta$\mid$\mu) but R(\gamma$\mid$\mu,\alpha,\beta)_W = R(\mu,\alpha,\beta,\gamma)_W - R(\mu,\alpha,\beta,\gamma)_W \neq R(\gamma$\mid$\mu,\alpha,\beta)$. The hypotheses $H_o : K' b = 0$ commonly tested were examined in the relation with the corresponding sums of squares for $R(\alpha$\mid$\mu), R(\beta$\mid$\mu), R(\alpha$\mid$\mu,\beta), R(\beta$\mid$\mu,\alpha), R(\alpha$\mid$\mu,\beta,\gamma), R(\beta$\mid$\mu,\alpha,\gamma), and R(\gamma$\mid$\mu,\alpha,\beta)$ under the restrictions.

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A Study on Dietary Intake and Vitamin and Mineral Supplement Use by Korean College Students Attending Web Class

  • Cheong, Sun-Hee;Kim, Jin-Sook;Lee, Mi-Young;Lee, Jeong-Hee;Chang, Kyung-Ja
    • Nutritional Sciences
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    • v.4 no.2
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    • pp.104-111
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    • 2001
  • The Purpose of this study was to investigate the dietary intake of nutrients and the use of vitamin and mineral supplements by Korean college students attending Web class and the socioeconomic, dietary and health-related factors involved. The subjects were 137 male and 115 female students amending a health and nutrition-related Web class at a cycler university. This cross-sectional survey was conducted by self-administered questionnaire and the data were analyzed by SAS and SPSS PC package programs. Nutrient intake data collected using three-day recall method were analyzed by the Computer Aided Nutritional Analysis Program. Average intake by male students of most nutrients except energy, vitamin B$_2$ and calcium and intake by female students of those except energy, vitamin $B_2$, calcium and iron was higher than Korean RDA. Nutrient intake of male students was significantly influenced by the mother s job, skipping meals, exercise, vitamin and mineral supplement use, flood supplement use and self-evaluated anemia. Skipping meals and flood supplement use significantly influenced the nutrient intake of female students. A total of 47.4% of male students and 53.9% of female students were vitamin and mineral supplement users. In female students, socioeconomic characteristics such as the father s education level and household income were significantly different between vitamin and mineral supplement users and non-users. In both male and female students, there were significant differences in cross analysis between vitamin and mineral supplement use and flood supplement use. As for the self-reported health status of male and female students, vitamin and mineral supplement users perceived their health status to be worse compared to non-users. Therefore, nutrition education via the Internet is necessary in order to encourage college students to practice optimal nutrition strategies, including maintaining well-balanced diets by choosing various floods wisely.

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The Effect of Shift-Work on Psychological Factors in University Hospital's Nurses. (대학병원 근무 간호사의 교대근무가 심리적 변인들에 미치는 영향)

  • Kang, Hyung-Gon;Jee, Young-Gun;Kim, Su-Jin;Yoon, Ho;Jung, Woo-Sik;Kim, Muyng-Ah;Lim, Ji-Young;Ko, Yu-Kyung
    • Journal of Korean Academy of Nursing Administration
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    • v.11 no.1
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    • pp.79-88
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    • 2005
  • Purpose: This study was conducted to assess the effects of shift-work on psychological factors in university hospital's nurses. Method: The subjects were 276 nurses who have worked in a university hospital and the nurses were questioned with self-reported questionnaire forms. We investigated psychological factors(anxiety, depression, stress and self-esteem), nurses' general characteristics and shift-work. The data was analyzed by using SAS for Windows 9.13. Results: The frequency of nurses with anxiety, depression and high stress were 56.5%, 44.9% and 19.6%, respectively. The mean score of self-esteem was 30.03. Stress was higher in cases of having shift-work. Immediately after doing shift-work, nurses had higher depression and stress, and lower self-esteem scores. After controlling confounding variables, psychological factors affected by shift-work was stress. An upward tendency in anxiety, depression and stress were found in cases of doing shift-work for more than 5 years. Conclusions: It is necessary to develope a program for reducing psychological disturbance at the early times of shift-work and to plan adequate shift-work intervals.

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The Relationship between Leadership Styles and Self-esteem, Satisfaction of Clinical Practice in Nursing Students (간호학생의 리더십 유형과 자아 존중감, 임상실습 만족도의 관계 연구)

  • Choi, Myung-Sook;Ha, Na-Sun
    • Journal of Korean Academy of Nursing Administration
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    • v.11 no.1
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    • pp.13-21
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    • 2005
  • Purpose: The Purpose of this study was to identify the relationship between leadership styles and self-esteem, satisfaction of clinical practice in nursing students. Method:The subjects were 386 nursing students who were in college and university located around Seoul, Kyounggi, Chungchung, Kangwon province. The data were collected from July 26 to September 18, 2004 by the structured questionnaires. For data analysis, descriptive statistics, Pearson correlation coefficient, and stepwise multiple regression with SAS package were used. Results: 1. The score of the nursing students' transformational leadership were higher than that of the nursing students' transactional leadership. 2. The mean of satisfaction of clinical practice perceived by nursing students was 3.07, and its subcategories were practice contents 3.28, practice evaluations 3.11, practice hours 3.00, practice environments 2.99, practice directions 2.98. 3. 'Transformational leadership', 'charisma', 'intellectual stimulation' and 'individual consideration' were positively related to 'self-esteem', 'satisfaction of clinical practice' of nursing students. 4. 'Contingent reward' was positively related to 'self-esteem'. And 'Management by exception' was negatively related to 'self-esteem'. 5. 'Transactional leadership', 'Contingent reward' were positively related to 'satisfaction of clinical practice' of nursing students. 6. As a result of multiple regression analysis, the key determinants of 'self-esteem' were 'charisma' and this explained 27.41% of the total variance of it. And the key determinants of 'satisfaction of clinical practice' were 'charisma' and this explained 10.94% of the total variance of it.

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A Study on the Influence of 8rand Image Consistency towards Brand Extension (상표이미지 일치가 상표확장 태도에 미치는 영향 연구 -인지도가 높은 여성의류상표를 중심으로-)

  • 임숙자;이지형
    • Journal of the Korean Society of Clothing and Textiles
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    • v.21 no.6
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    • pp.959-969
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    • 1997
  • This research is intended to help the development of new products and marketing strategies studying consumers' knowledge level and attitude towards original brand and the extension attitude related to the brand image. The detailed purposes of this study are as follow: First, it is to measure consumers' knowledge and attitude towards original brand. Second, it is to clarify the dimensions of the image about the original brand and extended brand product which is perceived by the consumer. Third, it is to meassure image consistency and product similarity between the original brand and extended product. The sample group consisted of female college students 393 in Seoul. Stratified sampling, based on major and grade of sturients and the structure of the college they were attending was used as sampling method. Questionnaires, which were selected from literature and proceeding researches published in Korea and abroad, were modified for this study, SAS Package was used for data analysis. The results observed in this study were as follow: 1. Consumers' knowledge level about original brand showed high among students majoring in clothing-related subjects and their general attitude proved to be positive. 2. Image factors of original brand were classified to dignity factor, personality/modernity factor, femininity factor, and ornamentation factor. Lipstick is considered to have high image consistency and product similarity. 3. Comparing the attitude before and after extension, extension to lipstick which showed high image consistency and product similarity received more positive reactions than one to bed cover sheet. 4. It was founded that although knowledge and attitude towards original brand with image consistency had no influence on the extension attitude, knowledge and attitude without image consistency influence the extension attitude.

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Effects of Foot Reflexology Education Program on Bowel Function, Anxiety and Depression in Nursing Students (발 반사요법 교육프로그램 제공이 간호대학생의 장 기능, 불안 및 우울에 미치는 효과)

  • Kim, Yeong-Hie;Choi, Euy-Soon
    • Women's Health Nursing
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    • v.9 no.3
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    • pp.277-286
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    • 2003
  • Purpose: The purpose of this study was to probe the effect of foot reflexology education program on nursing students with constipation, anxiety and depression. This study was a quasi-experimental study of pre-test and posttest design on non-equivalent control group. Method: The data of this study were collected from October 28, to December 14, 2002. The subjects consisted of 61 nursing students (experimental group: 31, control group: 30) with constipation, anxiety and depression. 31 out of them were devided into the experimental group and received foot reflexology education program that was authorized by the World Foot Reflexology Association and made to suit for the subjects by the author for 6weeks composed of 2 weeks theory and of 4 weeks practical skill on the program. The effect of the program was measured by Bowel Function Assessment Form for constipation, State Anxiety Inventory, and Beck Depression Inventory. Data were analyzed by t-test, $x^2$-test, Repeated measures ANOVA, Bonferroni multiple comparison using SAS/PC 8.12 program. Result: After all session of treatment, the score of bowel function assessment were significantly decreased in the experimental group compared to the control group. Outcomes of 6 and 7 weeks were significantly different from those of pre-experiment. After all session of treatment, anxiety states were significantly decreased in the experimental group compared to the control group. Outcomes of 7 weeks were significantly different from those of pre-experiment. After all session of treatment, depression states were significantly decreased in the experimental group compared to the control group. Outcomes of 6 and 7 weeks were significantly different from those of pre- experiment. Conclusion: The results are suggested that the foot reflexology education program might improve the bowel function, anxiety and depression for the nursing students with constipation, anxiety and depression.

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A Study on factors Affecting Quality of Life in Patients on Dialysis (투석환자의 삶의 질에 미치는 영향요인 분석)

  • Kim Nam-Cho;Song Hyo-Jeong;Oh Jung-Aha;Kim Tae-Yang;Kim Myung-Ja
    • Journal of Korean Academy of Fundamentals of Nursing
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    • v.10 no.2
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    • pp.163-170
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    • 2003
  • Purpose: This study was done to identify stress, fatigue, and self efficacy in patients on dialysis and identify their effect on quality of life. Method: The participants (n=149) who agreed to participate in the research were selected from among those who were on dialysis treatment at C University Medical Centers in Seoul and Inchon, and at C University Medical Center in Jeju. The data were collected from July, 2001 to March, 2002 using interviews. Data analysis was done with t-test, ANOVA, and multiple stepwise regression using the SAS program. Result: Quality of life was significantly different according to economic status, and type of dialysis. Quality of life for the group with higher economic status was better than for the group with lower economic status, and the group on peritoneal dialysis had higher quality of lift scores than the group on hemodialysis. As for self-efficacy, there were significant difference according to duration of disease, type of dialysis, and duration of dialysis. Stress was significantly different according to marital status. Quality of life was significantly predicted by stress (40.02%) and fatigue (3.85%). Conclusion: To improve quality of life for people on dialysis, their stress should be treated positively, also multi-dimensional nursing interventions to provide emotional support and nursing interventions to diminish fatigue are required.

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The Relations among ADL, Self-efficacy, and Life Satisfaction of Elderly Institution Residents (시설노인의 일상생활능력, 자기효능감 및 삶의 만족도와의 관계연구)

  • Oh, Hye-Kyung;Lee, Su-Kyung;Sok, So-Hyune R.;Kim, Kwuy-Bun
    • Journal of East-West Nursing Research
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    • v.13 no.1
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    • pp.48-56
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    • 2007
  • Purpose: This is a descriptive research to examine the levels of ADL, self efficacy, and life satisfaction of elderly institution residents, and the relations among the factors. Method: Data were collected through a questionnaire survey of elders aged over 65 at nursing homes in 9 areas throughout the country. Measures were the physical function scale, the general self efficacy scale, and LSI Z. Collected data were analyzed using SAS/PC11.0. Result: First, the mean levels of ADL, self efficacy, and life satisfaction were 2.83 (0.85), 2.79 (0.63), and 1.18 (0.42). Second, the relations among three factors were showed positive correlations. Third, (1) The level of ADL was statistically significantly different according to health condition, religious activity, volunteer activity, and friend meeting. (2) The level of self efficacy was statistically significantly different according to health condition, source of help, religious activity, volunteer activity, friend meeting, and elderly school & senior center. (3) The level of life satisfaction was statistically significantly different according to health condition, source of help, religious activity, volunteer activity, friend meeting, and elderly school & senior center. Conclusion: Conclusively, it is required to enhance ADL and self-efficacy in order to improve elderly institution residents’ life satisfaction.

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Effects of Fit Factor and Visual Acuity of Eyeglasses Wearers when Wearing Particulate Filtering Facepiece Respirators (안경착용자 방진마스크 착용 시 밀착계수와 착용시력에 미치는 영향)

  • Eoh, Won Souk;Shin, Chang Sup
    • Journal of the Korean Society of Safety
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    • v.35 no.3
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    • pp.105-115
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    • 2020
  • This study compares the difference of fit factors (FF) and visual acuity according to masks and eyeglasses preferences for 54 participants. We the precautions and behaviors of discomfort when wearing masks of eyewear wearers. Contact lens discomfort and priority action of complaints was investigated Glasses fitting factors is Optical Center Height(OH), Vertex Distance(VD) and Pantoscopic Angle(PA). We measured those factors and expressed by the ratio of standard point and change point. Quantitative fit factor was measured by Portacount Pro+ 8038. Also, we selected to 6 exercises among 8 exercises OSHA QNFT (Quantitative Fit testing) protocol to measure the fit factors. The pass/ fail criterion of FF was set at 100. Visual acuity(VA) test chart is developed by Chunsuk Han was used, Descriptive statistics was performed. Descriptive statistics(SAS ver 9.2), it is used geometric means, Wilcoxon analysis(P=0.05) When wearing the mask preferentially, fit factor(FF) was high according to the step of glasses fitting parameter. on the other hand, when the glasses first choice, the visual acuity(VA) was high. there was no significant difference. In the case of fit factor (FF), mask first choice/ glasses first choice is OH (p=0.671/ p=0.332), VD (p=0.602/ p=0.571) and PA (p=0.549/ p=0.607). Visual acuity (VA), mask first choice/ glasses first choice is OH (p=0.753/ p=0.386), VD (p=0.815/ p=0.557) and PA (p=0.856/ p=0.562). The workers of workplace and office chose glasses but occupational health workers and students chose mask. In case of discomforts, it was suggested to remove the mask and tolerate discomforts. The main discomforts and usual action of lens were dryness, hyperemia, foreign body sensation, ophthalmodynia, decreased vision and glasses wearing. Therefore, it is necessary to develop a mask wearing method education program considering glasses fitting and develop a hybrid model that minimizes inconvenience when wearing glasses and a mask at the same time.

The Relationship of Perceived Stress, Ways of Coping, and Stress Response of Nursing Students (간호학생의 스트레스 지각, 대처유형, 스트레스 반응간의 관계)

  • Ha, Na-Sun;Han, Kuem-Sun;Choi, Jung
    • Journal of Korean Academy of Nursing
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    • v.28 no.2
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    • pp.358-368
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    • 1998
  • This was designed to identify the relationship of perceived stress, ways of coping, and stress response in student nurses. The subjects of this study were 320 student nurses from two universities and three junior colleges located in Seoul. The data were collected from November 28 to December 10, 1997 by a questionnaire survey method. The instruments for this study were the perceived stress scale developed by Levenstein(1993), ways of coping scale developed by lazarus & Folkman (1984), and the stress response scale developed by Choi(1991). The data were analyzed by SAS program, using descriptive statistics, Pearson correlation coefficient, and ANOVA. The results are summarized as follows : 1. The mean score for the level of perceived stress was 2.55. 2. The mean score for the level of problem oriented coping was 1.61 and the mean score for the level of emotional oriented coping was 1.37. 3. The mean score for the level of stress response was 3.74. Stress was classified into nine factors and the order of scoring for the most frequent was ; assignments(3.98), as a nurse(3.97), interpersonal relationship(3.88). 4. The relationship between perceived stress and stress response revealed a positive significant correlation(r=0.23, p=0.0001) 5. The relationship between emotional oriented coping and stress response revealed a positive significant correlation(r=0.22, p=0.0001). 6. The relationship between perceived stress and emotional oriented coping revealed a positive significant correlation(r=0.13, p=0.020). In conclusion, this study revealed that the level of perceived stress and ways of coping were important factors influencing the stress response of student nurses. Therefore, in consideration of perceived stress, ways of coping should be included in the development of a stress management program for student nurses. Further research with an expanded area and subjects is recommended.

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