traditional survey methods may cause refusals to respond or untruthful replies when encounter the sensitive questions. the randomized response technique (rrt) is designed to decrease social desirability bias and obtain reliable estimates. this study aimed to apply these new methods on the sensitive questions survey.simmons model was applied in the survey of issues relevant to commercial sex amo...

OBJECTIVE To determine risky behaviors leading to unintentional injuries among Tehrani high school students in 2009. METHODS This cross-sectional study was carried out berween October and December 2009. Out of 237,300 (185151 governmental, 52149 non governmental) Tehrani high school students in both genders, 727 subjects were selected by multistage randomized sampling. Among 20 education dist...

The aim of the study was to improve students' ability understand Belief In God And Believing Apostle Of phrases through sort-term learning. method used is class action research. population 72 second graders at SDN 01 Haduyang Natar with sampling technique using multistage random sampling, so research sample 24 students. Data collection techniques tests and observations. Qualitative quantitative...

1. What is a Survey? 2. Probability sampling 3. Common probability sampling designs 3.1. Simple Random Sampling 3.2. Stratified Sampling 3.3. Cluster Sampling 3.4. Unequal Probability Sampling 3.5. Systematic Sampling 3.6. Stratified Multistage Sampling 4. Survey estimates and standard errors 5. Nonsampling errors 6. Sampling rare populations 7. Issues in Survey Design Acknowledgments Glossary ...

OBJECTIVES To estimate the prevalence of HIV and related risk behaviours among prisoners in Iran in 2009. METHODS Using multistage random sampling, we recruited 5,530 prisoners from 27 prisons in Iran. Behavioural data were collected using a face-to-face questionnaire-based interview, and HIV status was determined by ELISA of dried blood spots. Weighted estimates were calculated based on the ...

Methods: A cross-sectional study was used to look at 844 women who had given birth in the previous five years in Sodo town. The study employed a multistage-sampling scheme. Codes were given for all identified women in selected kebeles (neighbourhoods) and a simple randomsampling technique was used after generating random numbers using the Statistical Package for Social Sciences (SPSS). SPSS was...

BACKGROUND Psychological violence is the most common form of workplace violence that can affect professional performance and job satisfaction of health care workers. Although several studies have been conducted in Iran, but there is no consensus regarding current status of such violence. OBJECTIVES This study aimed to investigate the prevalence of psychological violence among healthcare worke...

OBJECTIVE The aim of the present study was to determine the prevalence of respiratory symptoms from occupational lung hazards among workers in industries of south Tehran, IRAN. METHODOLOGY This was a cross-sectional study in which by multistage random sampling items on demographic characteristics, cigarette smoking, occupational history and respiratory symptoms were collected of workers. RE...