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 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 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 Understanding of Plagiarism through Information Literacy: A Study among the Students of Higher Education of Nepal

2018 ◽  
Vol 3 (2) ◽  
pp. 165-181
Author(s):  
Prem Raj Adhikari
Keyword(s):  
Higher Education ◽  
Information Literacy ◽  
Random Sampling ◽  
Survey Design ◽  
Simple Random Sampling ◽  
Sampling Procedure ◽  
Survey Method ◽  
Sample Population ◽  
Education Students ◽  
Academic Resources

The study deals with the issues related to the contribution and the need of information literacy. This study has explored the importance of information literacy in academic work among the Nepali students of higher education. Plagiarism is the technical term for stealing someone else’s intellectual property. The research examined the truth about the understanding about plagiarism and copyright issues in the use of information. This quantitative study is aligned towards positivist paradigm and adopted survey design for data collection. The population of the study was students of higher education of Tribhuvan University, Kathmandu University and Pokhara University. Two hundred and fifty-four (254) sample populations were drawn using sample size formula for data. For this purpose, simple random sampling was used to determine the number of the sample population. The sample population was selected using random sampling procedure. The data were collected using survey method and were analyzed using SPSS descriptive statistics used for the purpose of data analysis. The findings of this study showed that information literacy is important and helpful in academic works in higher education. Students of higher education rely on the internet and library for their academic resources in Nepal. The use of information literacy is expected to be the part of education to make the learning process effective. This study also focused on the use of right information in appropriate ways among the students of higher education of Nepal. Research indicated that there was lack of understanding what students know and use about the supplied information in higher education in Nepal.

scholarly journals THE EFFECT OF FINANCING SOURCES ON REAL ESTATE DEVELOPMENT IN KENYA

2016 ◽  
Vol 1 (1) ◽  
pp. 39-53
Author(s):  
JOSEPH MWATHI
Keyword(s):  
Secondary Schools ◽  
Random Sampling ◽  
Survey Design ◽  
Sampling Technique ◽  
Simple Random Sampling ◽  
Coefficient Of Determination ◽  
Learning Resources ◽  
Unique Contribution ◽  
Target Setting ◽  
Governance Practices

Purpose: The purpose of this study was to investigate the influence of Board of management governance practices on students’ performance in Kenya Certificate of Secondary Education in Athi River Sub-county, Kenya.Methodology: The research used descriptive survey design. The study targeted 13 public secondary schools in Athi-River Sub-county. The target population was 208 Board of Management members, 13 Board of management chairpersons, 13 principals and 260 teachers in Athi-River Sub-county secondary schools. Stratified random sampling technique was used to select 13 schools to ensure that all the schools were well represented according to the various regions. Census technique was used to select all the 13 principals and 13 Board of management chairpersons. Simple random sampling was used to select 97 other Board of management members and 132 teachers.  The sample size of this study was therefore 255 respondents. The main instrument for the study was questionnaires. The Statistical Package for Social Sciences (SPSS) software version 20.0 was used to carry data analysis.Results: The findings revealed that provision of incentives to teachers, provision of rewards to students, involving teachers in target setting and provision of learning resources were found to be satisfactory variables in explaining students’ performance. This was supported by coefficient of determination also known as the R square of 48%. Regression of coefficients results showed that provision of enough learning resources and students performance was highly correlated, positively and significantly related (r=0.340, p=0.000).  Provision of incentives and students’ performance was also positively and significantly related (r=0.291, p=0.000). Further, results indicated that provision of rewards and student’s performance were positively and significantly related (r=0.262, p=0.000). It was further established that target setting and students’ performance were positively and significantly related (r=0.228, p=0.000).Unique contribution to theory, practice and policy: The study recommended that the training institutes like KEMI should organize tailor made courses for BOM members to equip them with the right knowledge on best governance practices in schools.

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