Optimal Survey Design: Lessons from a Stratified Random Sample of Macrobenthos

1979 ◽  
Vol 36 (4) ◽  
pp. 351-361 ◽  
Author(s):  
W. Cuff ◽  
N. Coleman
Keyword(s):  
Random Sample ◽  
Random Sampling ◽  
Survey Design ◽  
Simple Random Sampling ◽  
Optimal Number ◽  
The Common ◽  
Random Survey ◽  
Survey Designs ◽  
Number Of Individuals ◽  
Adequate Data

A stratified random sample of macrobenthos in Western Port (Victoria, Australia) provided adequate data to take an a posteriori look at the efficiency of various random survey designs in terms of their ability to provide precise estimates of the mean number of individuals per taxon, i.e. mean estimates with the smallest possible variance. Emphasis was placed on the efficiency of the stratified simple random sampling design. The analyses showed that bay-wide estimates resulting from various stratified designs would not have been substantially more precise than those from simple random sampling. This conclusion was not influenced by the allocation strategy used in the stratified design. On the other hand, substantial gains in precision could have been made, for the same total number of grab samples, by increasing the number of stations at the expense of the number of grab samples per station. Our data suggested that the optimal number of grab samples per station is only one, contrary to the common practice of multiple grab samples per station. Key words: stratified, random, survey, optimal, macrobenthos, sample, Western Port

Peran Kedisiplinan Belajar dan Kecerdasan Matematis Logis Dalam Pembelajaran Matematika

2015 ◽  
Vol 4 (2) ◽  
Author(s):  
Supardi Supardi
Keyword(s):  
Mathematics Achievement ◽  
Multiple Regression ◽  
Random Sampling ◽  
Survey Design ◽  
Sampling Technique ◽  
Simple Random Sampling ◽  
Normality Test ◽  
Simultaneous Impact ◽  
Inferential Analysis ◽  
Test Requirements

<p>The purpose of this study was to determine the influence of learning discipline <br />and logical mathematical intelligence on mathematics achievement. This study is a survey design. This research did in student class XI IPA SMA Negeri 98 Jakarta semester 2012/2013. The sample taken by simple random sampling technique, involved 40 students. The instrument were in the forms of questionnaires and tests. The data were analyzed first by test requirements, the normality test, linearity and multicollinearity. Based on the fulfillment of the criteria in terms of the tes analyzed, inferential analysis to the test the research hypothesis. The data were analyzed using correlation and multiple regression. The findings showed that (1) learning discipline and logical mathematical intelligence had a positive and significant simultaneous impact on mathematics achievement. (2) learning discipline had a positive and significant impact on mathematics achievement. (3) logical mathematical intelligence had a positive and significant impact on mathematics achievement. </p>

Users Satisfaction With Library Services

2018 ◽  
pp. 881-891
Author(s):  
Violet E. Ikolo
Keyword(s):  
Random Sampling ◽  
Information Sources ◽  
Survey Design ◽  
Simple Random Sampling ◽  
Library Services ◽  
State University ◽  
Questionnaire Data ◽  
Library Users ◽  
Descriptive Survey ◽  
Delta State University

The study focused on users satisfaction with library services at the Delta State University main Library, Abraka, Delta State. The objective was to find out if users are satisfied with the services, facilities, the library environment, information sources and staff of the library. Using the descriptive survey design the population for the study consisted of all registered library users in the Site II of the Delta State University, Abraka Campus. The study employed the simple random sampling techniques in selecting the sample size for the study, and with a questionnaire data were collected. The findings revealed that the services offered at the Delta State University are inadequate and below average. Most users were satisfied with the availability of information sources in the library but also registered that most of these information sources are not available for loan. The findings also showed that there is a significant relationship between the assessment of library collection by users and their satisfaction with information sources. The library environment is clean and the reading carrels are adequate but, there are no effective lightening and toilet facilities.

scholarly journals Survey design and analysis considerations when utilizing misclassified sampling strata

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Aya A. Mitani ◽  
Nathaniel D. Mercaldo ◽  
Sebastien Haneuse ◽  
Jonathan S. Schildcrout
Keyword(s):  
Ethnic Minorities ◽  
Random Sampling ◽  
Survey Design ◽  
Simple Random Sampling ◽  
Stratified Sampling ◽  
Simple Random Sample ◽  
Parameter Estimates ◽  
Complex Survey ◽  
Racial And Ethnic Minorities ◽  
Complex Survey Design

Abstract Background A large multi-center survey was conducted to understand patients’ perspectives on biobank study participation with particular focus on racial and ethnic minorities. In order to enrich the study sample with racial and ethnic minorities, disproportionate stratified sampling was implemented with strata defined by electronic health records (EHR) that are known to be inaccurate. We investigate the effect of sampling strata misclassification in complex survey design. Methods Under non-differential and differential misclassification in the sampling strata, we compare the validity and precision of three simple and common analysis approaches for settings in which the primary exposure is used to define the sampling strata. We also compare the precision gains/losses observed from using a disproportionate stratified sampling scheme compared to using a simple random sample under varying degrees of strata misclassification. Results Disproportionate stratified sampling can result in more efficient parameter estimates of the rare subgroups (race/ethnic minorities) in the sampling strata compared to simple random sampling. When sampling strata misclassification is non-differential with respect to the outcome, a design-agnostic analysis was preferred over model-based and design-based analyses. All methods yielded unbiased parameter estimates but standard error estimates were lowest from the design-agnostic analysis. However, when misclassification is differential, only the design-based method produced valid parameter estimates of the variables included in the sampling strata. Conclusions In complex survey design, when the interest is in making inference on rare subgroups, we recommend implementing disproportionate stratified sampling over simple random sampling even if the sampling strata are misclassified. If the misclassification is non-differential, we recommend a design-agnostic analysis. However, if the misclassification is differential, we recommend using design-based analyses.

scholarly journals Effect of Teachers’ Self-Efficacy on their Attitude towards the Implementation of Multicultural Education literacy in Harari Government Secondary Schools

2021 ◽  
Vol 9 (1) ◽  
pp. 172
Author(s):  
Debela Tezera ◽  
Gadissa Bekele
Keyword(s):  
Secondary Schools ◽  
Multicultural Education ◽  
Self Efficacy ◽  
Random Sampling ◽  
Positive Impact ◽  
Survey Design ◽  
Panel Discussion ◽  
Sampling Technique ◽  
Simple Random Sampling ◽  
Policy Action

This study is aimed to investigate effect of teachers’ self-efficacy on their attitude towards the implementation of Multicultural Education literacy (MCEL) in Harari Region Secondary Schools. To realize this descriptive survey design with the quantitative approach is adopted. One hundred, teachers are selected by using stratified random sampling technique and then the simple random sampling technique. Data are collected through closed-ended questionnaires. Descriptive and inferential statistical data analysis is employed. The finding showed that the practice of MCEL in school was medium and teachers’ self-efficacy toward implementations of MCEL in the schools was found statistically significant. Self-efficacy in the implementation of MCEL was a statistically significant predictor of teacher’s attitude and practices toward the implementation of MCEL in the schools respectively. Self-efficacy contributed 17% on attitude and 26 % to practices in the implementation of MCEL had a positive impact. Self-efficacy of teachers toward MCEL had a statistically significant moderate positive relationship with teachers’ practices of MCEL. Self-efficacy had a positive impact on the attitude of teachers and practices of teachers in the implementation of MCEL. Based on the findings, it was concluded the study presented for further research in the field and policy action to prepare teachers in multicultural setting curricula and multicultural educators influencing the development of cultural tolerance, mutual understanding, and unity among diverse students. Hence, it was recommended that organizing panel discussion in order to improve self-efficacy and attitude of teachers from multicultural perspectives in line with implementation of multicultural education through media to build tolerance, mutual respect, build positive attitudes, and national building practices among student in the schools. Further implications and directions for future study are forwarded.

scholarly journals Probing into Job Satisfaction Among Community Campus Teachers

2021 ◽  
Vol 9 (2) ◽  
pp. 1-10
Author(s):  
Lok Raj Sharma
Keyword(s):  
Job Satisfaction ◽  
Random Sampling ◽  
Research Study ◽  
Survey Design ◽  
Sampling Technique ◽  
Simple Random Sampling ◽  
Teaching Profession ◽  
Female Teachers ◽  
Margin Of Error ◽  
Significant Difference

The chief objective of this article is to probe into the level of job satisfaction among community campus teachers. Job satisfaction is the state of how content persons are with their jobs. It can be appraised on the basis of their responses to their feelings, perceptions, likes and dislikes for the jobs. Divergent factors can influence the satisfaction level of the personnel in their work. A crosssectional survey design was adopted to carry out the research study. Twenty question items of five-point Likert scale type regarding the job satisfaction of the teachers were administered at two campuses situated in Dang District of Nepal in 2020. Simple random sampling technique (lottery) was used to select 52 campus teachers as respondents for the study by maintaining the confidence level (95%) and the margin of error (5%) from the population of 59 teachers. The collected data were statistically analyzed by using SPSS .The study revealed that the teachers were satisfied (Median=4) with their teaching profession at the respective campuses. The Mann-Whitney U test showed that the teachers of the two campuses had a similar level of job satisfaction. Similarly, there was no statistically significant difference in the job satisfaction between male teachers and female teachers.

scholarly journals ANALISIS PENDAPATAN PETANI TOMAT PADA LAHAN SAWAH DI DESA TOSURAYA SELATAN KECAMATAN RATAHAN KABUPATEN MINAHASA TENGGARA

2015 ◽  
Vol 11 (1) ◽  
pp. 51
Author(s):  
Welson Wangke ◽  
Benu Olfie L. S
Keyword(s):  
Random Sample ◽  
Random Sampling ◽  
Quantitative Method ◽  
Sampling Method ◽  
Descriptive Analysis ◽  
Simple Random Sampling ◽  
Paddy Fields ◽  
Rice Farmers ◽  
Random Method

This study aims to determine how much income and costs of tomato growers in paddy fields. The method used is descriptive quantitative method. The sampling method in this study is simple random sampling method is simple random method by taking a random sample. The number of samples of tomato growers and rice farmers are respectively of 7 farmers. Analysis of the data used in this research is descriptive analysis. To determine the level of income of farmers used the analysis of income. The results of this study are income tomato farmers in paddy fields Rp. USD 40,000,000 and expenses. 11,769,000. That means farming tomatoes tomato farmers benefit because the value of R / C > 1 is 3:39 Income tomato farmers in paddy fields is greater when compared with income of rice farmers.  ABSTRAK Penelitian ini bertujuan untuk mengetahui berapa besar pendapatan dan biaya yang dibutuhkan petani tomat pada lahan sawah. Metode penelitian yang digunakan yaitu metode deskriptif kuantitatif. Metode pengambilan sampel dalam penelitian ini adalah metode simple random sampling yaitu metode acak sederhana dengan mengambil sampel secara acak. Jumlah sampel petani tomat dan petani padi sawah masing-masing sebanyak 7 petani. Analisa data yang digunakan dalam penelitian ini yaitu analisis deskriptif. Untuk mengetahui tingkat pendapatan petani digunakan analisis pendapatan. Hasil dari penelitian ini yaitu Pendapatan petani tomat pada lahan sawah yaitu  sebesar  Rp.   40,000,000 dan pengeluaran Rp. 11,769,000. Itu berarti usahatani tomat memberikan keuntungan bagi petani tomat karena nilai R/C > 1 yaitu 3.39 Pendapatan petani tomat pada lahan sawah lebih besar jika dibandingkan dengan pendapatan petani padi sawah.

scholarly journals Pengaruh Proses Rekruitmen Terhadap Kinerja Organisasi Di Pt. Angkasa Pura I (Persero) Bandara Internasional Makassar

2017 ◽  
Vol 3 (1) ◽  
pp. 30
Author(s):  
Hastuti Hastuti ◽  
Budisetiawati Budisetiawati ◽  
Ihyani Malik
Keyword(s):  
Linear Regression ◽  
Organizational Performance ◽  
Random Sample ◽  
Random Sampling ◽  
Hypothesis Test ◽  
Simple Random Sampling ◽  
Statistical Program ◽  
Quantitative Descriptive

The study aims to determine how much influence the process recruitmen the performance of the organization. This types of research is carried out with the kind of quantitative descriptive type. In taking a random sample was simple (random sampling). The data was analyzed by linear regression and correlation with the help of statistical program spss 16. Hypothesis test shadow that the variables of process recruitmen (t) = 0,751 with sig value of 0,355 for the value of the signature that gained more  than 0,05 indicates that the value of (t) obtained is significant. This means that the process recruitmen variables (x) effect on performance of the organization (y) then Ho are accepted. The are fore the outhers accepted hypothesis.Keyword:The culture of process recruitmen, organizational, performance Penelitia ini bertujuan untuk mengetahui seberapa besar pengaruh proses  rekruitmen terhadap kinerja organisasi. Jenispenelitian iniadalah jenis kuantitatif dilakukan dengan tipe penelitian survey.Dalam mengambil sampel dilakukan secara data pengaruh proses rekruitemen dikumpul dengan menggunakan instrument berupa questioner, observasi terhadap beberapa responden. Data tersebut dianalisis secara statistik regresi linear dan korelasi dengan bantuan statistic program SPSS release 16. Uji hipotesis menunjukkan bahwa variable proses rekruitmen (t) = 0,751 dengan nilai sig sebesar 0,000 karena nilai dari sig yang diperoleh lebih dari 0,355 maka menunjukkan bahwa (t) yang diperoleh tersebut signifikan. Hal ini berarti bahwa variable proses rekruitmen (X) berpengaruh terhadap kinerja organisasi (Y) maka Ho diterima. Oleh karena itu hipotesis yang diajukan penulis diterima.Kata kunci:proses rekruitmen, kinerja organisasi

scholarly journals EFEKTIFITAS PIJAT TUI NA DALAM MENGATASI KESULITAN MAKAN PADA BALITA DI RW 02 KELURAHAN WONOKROMO SURABAYA

2018 ◽  
Vol 8 (2) ◽  
Author(s):  
Annif Munjidah
Keyword(s):  
Random Sampling ◽  
Simple Random Sampling ◽  
P Value ◽  
Chi Square ◽  
Feeding Difficulties ◽  
Oral Motor ◽  
Chi Square Test ◽  
The Common ◽  
Feeding Difficulty ◽  
Loss Of Appetite

The Effectivity of Tui Na massage to overcome feeding difficulties in infants in RW 02 of Wonokromo District Surabaya. The children’s growth and development depends on the fulfillment of nutrients. Some problems which often occur in the fulfillment of nutrient are feeding difficulty in infants which can cause growth interference or stunting. The common cause of feeding difficulty in infants is divided into 3 factors, such as loss of appetite, impaired gastrointestinal function, and disruption of eating process of oral motor. To overcome feeding difficulty can be done through pharmacology or non pharmacology. The efforts of pharmacology way such as by giving miltivitamin, and another micronutrient. While non pharmacology way such as through drink herbal / herbs, massage, acupressure, and acupuncture. This study aims to analyze the effectivity of Tui Na massage in overcome feeding difficulty in infants. This was an observational analytic with crosssectional approach. The population used was all mothers and infants who are living in RW 02 Wonokromo District Surabaya as 27 people. The sample used is mostly mothers and the infants who were living in RW 02 of Wonokromo District Surabaya was 23 people. Its used a simple random sampling. The data were analyzed by Chi Square test with significant value alpha = 0.05. The results showed that the p value 0.009 < α 0.05. Tui Na massage is effective to overcome feeding difficulty in infants in RW 02 Wonokromo District Surabaya. The conclusions of this study is the more routine Tui Na massage is done, the easier way to overcome feeding difficulty. It is expected that the infant’s mother are capable and routine to apply this massage

scholarly journals PSYCHOLOGICAL ABUSE AND SELF-EFFICACY AS PREDICTORS OF SEXUAL ABSTINENCE AMONG ADOLESCENTS IN MAKURDI METROPOLIS

2021 ◽  
pp. 1-12
Author(s):  
Anna Ngbea ◽  
◽  
Abraham Kwaghgbah ◽  
Keyword(s):  
Significant Influence ◽  
Self Efficacy ◽  
Random Sampling ◽  
Psychological Abuse ◽  
Survey Design ◽  
Sampling Technique ◽  
Simple Random Sampling ◽  
Sexual Abstinence ◽  
Cross Sectional Survey ◽  
Cross Sectional

This study investigated the influence of Psychological Abuse and Self-Efficacy as predictors of Sexual Abstinence among Adolescents in Makurdi metropolis. The Cross-Sectional Survey design was employed where 208 adolescents in Makurdi metropolis consisting of 98 (47.12%) males and 110 (52.88%) females were used. Their ages ranged from 12-22years with a mean age of 17.54years (SD=3.78). Simple Random sampling technique was used to draw samples for the study. Three instruments were used for data collection; Child Abuse Scale, Generalized Self-Efficacy Scale and the Sexual Abstinence Behaviour Scale. Three hypotheses were tested using Simple Linear and Multiple Regression. Findings indicated that there was a significant influence of psychological abuse on sexual abstinence among adolescents. Secondly, there was a significant influence of self-efficacy on sexual abstinence among adolescents. Lastly, psychological abuse and self-efficacy are significant joint predictors of sexual abstinence among adolescents. It was recommended that the society should desist from abusing adolescents since it was known to affect their sexual behaviour.

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