• 제목/요약/키워드: chi-square test

검색결과 2,805건 처리시간 0.029초

간호학과 신입생의 성격유형, 학습스타일과 학업성취도의 관계 (The Relationship between Personality Types, Learning Style, and Academic Achievement in First Year Nursing Students)

  • 윤희장;곽은미;권선영
    • 문화기술의 융합
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    • 제5권2호
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    • pp.247-255
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    • 2019
  • 본 연구는 간호학과 신입생들의 성격유형과 학습스타일, 학업성취도 간의 상관성을 탐구하기 위해 시행되었다. 간호학과 신입생 144명을 대상으로 2018년 3월 6일부터 5월 18일 까지 자료를 수집하였다. 결과 분석은 빈도와 백분율, 평균 및 표준편차, t-test와 ANOVA, Chi-square test 그리고 Pearson correlation coefficient로 확인하였다. 연구 대상자의 성격유형은 외향적 성향(58.3%)이 내향적 성향 보다 많았으며 감각적 성향(66.7%)과 감정형(77.8%)이 직관적 성향과 사고형 보다 많았고 판단형(50.7%)이 인지형 보다 많았다. 학업성취도는 여학생이 남학생 보다 높았고(t=3.277, p<.001), 내향적 성향이 외향적 성향 보다 높았다(t=3.541, p<.001). 성격유형별 학습스타일의 차이는 판단형이 다른 성격 유형간에 통계적으로 유의미한 차이를 보였다(${\chi}^2=18.409$, p<.001). 성별과 TF지표(r=.209, p<.05), 성별과 학업성취도(r=.265, p<.01), JP지표와 학습스타일(r=.262, p<.01), EI지표와 학업성취도(r=.285, p<.01) 사이에 유의한 양의 상관관계가 나타났다. 본 연구를 통해 확인된 간호학과 신입생의 성격유형, 학습스타일, 학업성취도 결과를 바탕으로 개인에게 적합한 교수-학습법의 개발 및 활용이 필요할 것이다.

부비동 단순 X선 촬영으로 확인한 소아 환자의 비염(鼻炎)과 부비동염(副鼻洞炎) 비교 (Comparison Between Rhinitis and Sinusitis in Young Patients Diagnosed by PNS Plain Radiograph)

  • 김진명;김윤범;남혜정
    • 한방안이비인후피부과학회지
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    • 제21권3호
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    • pp.140-149
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    • 2008
  • Objective : This study was performed to find out the difference of symptoms between rhinitis and sinusitis in young patients who were diagnosed by PNS plain radiograph( PNS series), Methods: We did statistical analysis about 147 new outpatients under 12 year-old who had visited the department of ophthalmology, otolaryngology, dermatology in Kyung Hee Oriental Medicine Center from March 2, 2006 to February 29, 2008. All of the patients were diagnosed by PNS series and we divided the patients with two groups; rhinitis group and sinusitis group. We checked the OPD records and explore the distribution on sex, experience of past western therapy, age and duration. Then we divided symptoms into nine; 'nasal obstruction', 'purulent rhinorrhea', 'cough & sneezing', 'watery rhinorrhea', postnasal drip', 'sputum', 'head problem', 'snoring & throat discomfort' and 'epistaxis'. We also divided age into 2 groups: $0\sim7$ years old and $8{\sim}12$ years old. We carried out chi-square test as a statistical method. Results : The results were as follows. 1. Sinusitis group were 102(69.5%); 62 have only sinusitis. 40 have both sinusitis and adenoidal hypertrophy. Rhinitis group were 45(30.5%); 13 have adenoidal hypertrophy and 32 were negative. 2. Male were 98(sinusitis 65, rhinitis 33), female were 49(sinusitis 37, rhinitis 12). 3. Patients who had experienced past western therapy were 120(sinusitis 81, rhinitis 39), no experienced patients were 27(sinusitis 21, rhinitis 6). 4. Distribution on age of sinusitis was 1(1 yr), 2(2 yrs), 3(3 yrs), 15(4 yrs), 15(5 yrs), 23(6 yrs), 13(7 yrs), 12(8 yrs), 8(9 yrs), 5(10 yrs), 1(11 yrs), 4(12 yrs). Distribution on age of rhinitis was 1(1 yr), 0(2 yrs), 1(3 yrs), 1(4 yrs), 9(5 yrs), 5(6 yrs), 3(7 yrs), 5(8 yrs), 1(9 yrs), 8(10 yrs), 6(11 yrs), 5(12 yrs), 5. Duration of sinusitis was 20(<2 months), 6($2{\sim}3$ months), 11($3\sim6$ months), 34($6\sim12$ months), 31(>12 months) and of Rhinitis was 11(<2 months), 0($2\sim3$ months), 5($3\sim6$ months), 18($6\sim12$ months), 11(>12 months) 6. Distribution on symptoms, sinusitis patients were 86(nasal obstruction), 52(purulent rhinorrhea), 46(cough & sneezing), 38(watery rhinorrhea), 41(postnasal drip), 23(sputum), 18(head problem), 15(snoring & throat discomfort), 6(epistaxis). The each symptom and sinusitis have no relation by chi-square test. 7. The number of patients who were 0 $\sim$ 7 years old was 92: sinusitis 72(49%), non-sinusitis 20(13.6%). The number of patients who were 8 $\sim$ 12 years old was 58: sinusitis 30(20.4%), non-sinusitis 25(l7%). By chi-square test(confidence level 95%), sinusitis and age under 7 have a significant relation(p=0.003). Conclusions : There is no relation between rhinologic symptoms and sinusitis. Patients under 7 years old with rhinologic symptoms tend to have sinusitis.

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일반국도 설계시간계수의 적정 확률분포 선정 및 추정 (The Selection of Optimal Probability Distribution and Estimation for Design Hourly Factor in National Highway Roads)

  • 조준한;한종현;김성호;이병생
    • 대한교통학회지
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    • 제24권6호
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    • pp.33-43
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    • 2006
  • 본 연구는 도로의 기능 및 통행특성. 차로수, 연평균일교통량 등을 고려하여 설계시간계수와의 관계를 살펴보고 적정 확률분포형 선정과 K값을 추정하였다 이를 위해 2005년도 상시 교통량 조사지점에서 수집된 교통자료를 이용하여 14개의 확률분포형을 적용하였다. 각 확률분포형은 최우도법을 이용하여 매개변수를 추정하였으며 각 분포형별로 매개변수 적합성 조건을 검토하였다. 적정 확률분포형의 결정은 chi-square검정을 통하여 대상 분포형의 기각유무를 판단하였으며. 그 결과에 대해 우선순위를 정하여 적정 확률분포형을 선정하였다. 그리고 각 유형별 AADT에 따른 적정 K계수를 추정하였다. 그 결과, 지방부 2차로 및 4차로. 도시부, 관광부도로의 적정 확률분포형은 각각 Pearson V, LogLogistic, LogLogistic, Extreme value 분포로 분석되었으며 적정 K계수는 각각 $0.1{\sim}0.2,\;0.09{\sim}0.14,\;0.07{\sim}0.13,\;0.1{\sim}0.2$로 추정되었다.

액체섬광계수기 장비의 계측조건 확립에 관한 연구 (Research on Measurement Condition Establishment of a Liquid Scintillation Counter System)

  • 박응섭;한상준;이승진;김희강;이나영;문지연
    • Journal of Radiation Protection and Research
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    • 제31권3호
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    • pp.155-164
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    • 2006
  • 액체섬광계수기를 이용하여 환경시료를 분석하는 모든 과정에서 계측 조건 및 방법론 차이에 의한 불확실성이 존재할 수 있을 것으로 판단하여 본 연구에서는 이에 대한 평가를 정량적으로 수행함으로써 비교적 정확하게 환경시료를 분석하고자 하였다. 이를 위해 결과에 영향을 미칠 수 있는 변수를 도출한 후 각 변수에 대한 영향을 평가한 결과, 분석시료를 제조하는 과정에서의 인적 및 물리적인 불확실성은 무시할 정도로 미미하였고, 측정용기의 무게 차이에 따른 영향은 나타나지 않았다. 외부선원의 조사시간을 단계적으로 증가시킨 결과 시간이 증가함에 따라 데이터의 분산 정도는 감소하면서 $75{\sim}90$ sec에서 포화상태에 도달하였고, Repeat 방법이 Replicate 방법에 비해 데이터의 신뢰성이 높게 나타났다. 또한 방치시간에 따른 영향을 평가한 결과 분석 냉 암소에서 약 1,000 min 이상 방치시킨 후 시료에 대한 분석을 수행해야만 잔상 및 이상 유동에 의한 영향은 거의 없는 것을 알 수 있었고, 결과에 대한 검증을 수행하기 위해 방사능 오차분석과 함께 Chi-square test를 수행한 결과 신뢰성 있는 결과를 보여주었으며 이러한 분석 및 검증 결과에 근거하여 계측 결과에 대한 오차 및 불확실성을 감소시킬 수 있었다.

Decomposition of category mixture in a pixel and its application for supervised image classification

  • Matsumoto, Masao;Arai, Kohei;Ishimatsu, Takakazu
    • 제어로봇시스템학회:학술대회논문집
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    • 제어로봇시스템학회 1992년도 한국자동제어학술회의논문집(국제학술편); KOEX, Seoul; 19-21 Oct. 1992
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    • pp.514-519
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    • 1992
  • To make an accurate retrieval of the proportion of each category among mixed pixels (Mixel's) of a remotely sensed imagery, a maximum likelihood estimation method of category proportion is proposed. In this method, the observed multispectral vector is considered as probability variables along with the approximation that the supervised data of each category can be characterized by normal distribution. The results show that this method can retrieve accurate proportion of each category among Mixel's. And a index that can estimate the degree of error in each category is proposed. AS one of the application of the proportion estimation, a method for image classification based on category proportion estimation is proposed. In this method all pixel in a remotely sensed imagery are assumed to be Mixel's, and are classified to most dominant category. Among the Mixel's, there exists unconfidential pixels which should be categorized as unclassified pixels. In order to discriminate them, two types of criteria, Chi square and AIC, are proposed for fitness test on pure pixel hypothesis. Experimental result with a simulated dataset show an usefulness of proposed classification criterion compared to the conventional maximum likelihood criterion and applicability of the fitness tests based on Chi square and AIC,

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Effects of Lexical Aspect on the Interlanguage of Ibibio ESL Learners: Later than Sooner

  • Willie, Willie U.
    • 비교문화연구
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    • 제43권
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    • pp.459-483
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    • 2016
  • The main objective of this paper is to test the major prediction of the Aspect Hypothesis on interlanguage narratives collected from 171 Ibibio ESL learners in a classroom setting using sets of picture stories. Aspect Hypothesis predicts that lexical aspectual classes of verbs would determine the pattern of acquisition and distribution of tense-aspect morphology at the very early stages of L2 acquisition of tense-aspect verbal morphology. That is, telic verbs would be marked with the past tense-aspect verbal morphology before atelic verbs in the interlanguage of ESL learners irrespective of their L1 background. The results of our data analyses show a significant effect from the lexical aspect on the acquisition and distribution of tense-aspect morphology with chi-square statistics of ($x^2=196.92$,df = 6, n = 1664, p = <.0001). However, the effect of the lexical aspect is shown to be more prominent among Ibibio ESL learners at higher levels of proficiency. This is contrary to the prediction regarding Aspect Hypothesis. The paper concludes that the influence of the lexical aspect on the pattern of acquisition and distribution of tense-aspect morphology may be universal but the actual point along the developmental pathway when such influence is obtainable is yet to be determined. This calls for more research into the pattern of the L2 acquisition of tense-aspect verbal morphology.

미국(美國) 테네시주(州) 컴벌랜드 고원(高原)의 임분(林分) 성장(成長)과 수확(收穫) 예측(豫測)에 있어서 Land Classification System의 사용(使用) (Use of a Land Classification System in Forest Stand Growth and Yield Prediction on the Cumberland Plateau of Tennessee, USA)

  • 성은숙
    • 한국산림과학회지
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    • 제86권3호
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    • pp.365-377
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    • 1997
  • 미국 테네시주 컴벌랜드 고원의 대부분은 혼합 침엽수림으로 되어 있어 기존의 성장과 산출 예측 방식을 적용하기 어렵다. 또한 그들의 역사가 알려져 있지 않을 뿐더러 많은 부분이 동령림이 아니기 때문에 성장과 수확 예측 모델을 만드는데 있어서 지위지수를 변수로 사용하는 것이 제한되어 있다. 임지형(landtype)은 거의 같은 수확을 내는 임지를 포함하도록 고안되어 있기 때문에 이런 혼효림에서 지위지수 대산 사용될 수 있다. 임지형을 사용한 식생 결정을 위해, Chi-square로 임지형과 임형(forest type)과의 의존성을 검사하였다. 임지형 사이에서 수확의 유의성은 회귀분석과 분산분석을 이용하여 검사되었다. 흉고단면적성장(basal area growth)은 Moser and Hall(l969)이 개발한 비선형 모델에 적용되었다. 또한 흉고단면적성장과 재적성장은, 임지형과 임지형급(landtype class)에 의한 선형 회귀분석을 통해 최초 총 흉고단면적과 최초 재적에 관한 하나의 함수로서 예측되었다. 분산분석으로 임지형에 따른 흉고단면적성장과 재적성장의 유의성을 검사하였다. 지위급(site class)과 임지형의 유의성은 Chi-square로 검사되었다. 표본 강도가 낮아 검증이 의심스러웠음에도 불구하고, 식생형 (vegetation type)은 연구 지역 내 임지형과 관계된 것으로 보인다. 본 연구에서 임지형 간의 수확은 통계학적인 유의성이 발견되지 않았다.

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방문판매 화장품 뷰티카운셀러들의 교육경로와 실태에 관한 연구 (A Study on Actual Conditions and Channels of Training for Beauty Counsellors in Charge of Door-to-Door Cosmetics Sales)

  • 황혜주;임진숙
    • 한국컴퓨터산업학회논문지
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    • 제8권4호
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    • pp.269-280
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    • 2007
  • 본 연구는 방문판매를 담당하는 뷰티카운셀러들을 대상으로 직업만족도와 전문성에 대한 사고를 파악하고, 뷰티카운셀러들의 제품에 대한 실무 교육 경로와 실태, 매출과의 상관관계를 파악하여 향후 경쟁력 있는 뷰티카운셀러를 만들어 가는데 도움이 되고자 하였다. 분석기법으로는 연구대상자의 일반적 특성을 파악하기 위하여 빈도와 백분율을 산출하였다. 또한 화장품 카운슬러들의 근무현황과 카운슬러의 교육경로 및 실태, 카운슬러 실무에 관한 교육내용, 그리고 카운슬러의 교육방법 및 필요성에 대한 카운슬러들의 인식을 알아보기 위해 $x^2$(Chi-square)검증과 빈도분석, t-test(검증), 그리고 One-way ANOVA(일원변량분석)을 실시하였다. 연구결과 화장품 판매를 위하여 전문적인 교육을 받은 뷰티카운셀러가 필요한 것 등을 얻을 수 있었다.

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Knowledge of Risk Factors & Early Detection Methods and Practices towards Breast Cancer among Nurses in Indira Gandhi Medical College, Shimla, Himachal Pradesh, India

  • Fotedar, Vikas;Seam, Rajeev K.;Gupta, Manoj K.;Gupta, Manish;Vats, Siddharth;Verma, Sunita
    • Asian Pacific Journal of Cancer Prevention
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    • 제14권1호
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    • pp.117-120
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    • 2013
  • Background: Breast cancer is an increasing health problem in India. Screening for early detection should lead to a reduction in mortality from the disease. It is known that motivation by nurses influences uptake of screening methods by women. This study aimed to investigate knowledge of breast cancer risk factors & early detection methods and the practice of screening among nurses in Indira Gandhi Medical College, Shimla, Himachal Pradesh. Materials and Methods: A cross-sectional study was conducted using a self-administered questionnaire to assess the knowledge of breast cancer risk factors, early detection methods and practice of screening methods among 457 nurses working in a Indira Gandhi Medical College, Shimla-H.P. Chi square test, Data was analysed using SPSS version 16. Test of significance used was chi square test. Results: The response rate of the study was 94.9%. The average knowledge of risk factors about breast cancer of the entire population is 49%. 10.5% of nurses had poor knowledge, 25.2% of the nurses had good knowledge, 45% had very good knowledge and 16.3% of the nurses had excellent knowledge about risk factors of breast cancer and early detection methods. The knowledge level was significantly higher among BSC nurses than nurses with Diploma. 54% of participants in this study reportedly practice BSE at least once every year. Less than one-third reported that they had CBE within the past one year. 7% ever had mammogram before this study. Conclusions: Results from this study suggest the frequent continuing medical education programmes on breast cancer at institutional level is desirable.

A comparative evaluation of fracture resistance of endodontically treated teeth restored with different post core systems - an in-vitro study

  • Makade, Chetana S.;Meshram, Ganesh K.;Warhadpande, Manjusha;Patil, Pravinkumar G.
    • The Journal of Advanced Prosthodontics
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    • 제3권2호
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    • pp.90-95
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    • 2011
  • PURPOSE. To compare the fracture resistance and the mode of failure of endodontically treated teeth restored with different post-core systems. MATERIALS AND METHODS. Root canal treatment was performed on 40 maxillary incisors and the samples were divided into four groups of 10 each. For three experimental groups post space preparation was done and teeth were restored with cast post-core (Group B), stainless steel post with composite core (Group C) and glass fiber post with composite core using adhesive resin cement (Group D). Control group (A) samples were selected with intact coronal structure. All the samples were prepared for ideal abutment preparation. All the samples were subjected to a load of 0.5 mm/min at $130^{circ}$.until fracture occurred using the universal testing machine. The fracture resistance was measured and the data were analyzed statistically. The fracture above the embedded resin was considered to be favorable and the fracture below the level was considered as unfavorable. The statistical analysis of fracture resistance between different groups was carried out with t-test. For the mode of failure the statistical analysis was carried out by Kruskal-Wallis test and Chi-Square test. RESULTS. For experimental group Vs control group the fracture resistance values showed significant differences (P<.05). For the mode of failure the chi-square value is 16.1610, which means highly significant (P=.0009) statistically. CONCLUSION. Endodontically treated teeth without post core system showed the least fracture resistance demonstrating the need to reinforce the tooth. Stainless steel post with composite core showed the highest fracture resistance among all the experimental groups. Teeth restored with the Glass fiber post showed the most favorable fractures making them more amenable to the re-treatment.