objectives: the purpose of the study was to compare the emotion regulation strategies of blind and sighted students.  methods: the research method used was descriptive and causal-comparative, and the statistical population included all the sighted and blind students at the university of isfahan and the islamic azad university of khorasgan. the sample volume was 64 members (32 members in each gr...

This study proposes ratio estimators by adapting the estimators type ofRay and Singh [J. Ind. Stat. Assoc. 19 (1981) 147] to traditional and the other ratio-type estimators in simple random sampling in literature. Theoretically, mean square error (MSE) equations of all proposed ratio estimators are obtained and compared with each other. By these comparisons the conditions, which make each propo...

We present a simple algorithm for estimating the cardinality of a set I, based on a RandomSample(I) primitive that returns an element of I uniformly at random. Our algorithm with probability (1−perr) returns an estimate of |I| accurate within a factor (1 ± δerr) invoking RandomSample(I) at most O (

a cross-sectional study with a random cluster sampling design was carried out to estimate the seroprevalence of bovine herpesvirus type 1 (bhv-1) in non-vaccinated dairy herds in hamedan province, west of iran. simple random sampling was used for selection of cattle in each herd. informative data about each herd and selected animals were recorded by the farm manager in a provided questionnaire....

Sampling is a fundamental operation for the auditing and statistical analysis of large databases. It is not well supported in existing relational database management systems. We discuss how to obtain samples from the results of relational queries without first performing the query. Specifically, we examine simple random sampling from selections, projections, joins, unions, and intersections. We...

Traditional formulae for standard errors and subsequent statistical significance tests implemented in various popular statistical packages are based on the premise that the data are a simple random sample (SRS) of observations from a superpopulation. Equivalently, the observations are assumed to be independent and identically distributed (IID). For complex analytic surveys, these assumptions ar...

objective: economic analysis was performed for the main horticultural crops in buin zahra (pistachio, peach, nectarine, and apple). there were dependent and independent variables in this research. methods: the independent variables were planting method (mechanized and conventional), land area used for fruit production, and land ownership. the maximum energy used, mostly in the form of fossil fu...

Random sampling is an efficient method to deal with constrained optimization problems in computational geometry. In a first step, one finds the optimal solution subject to a random subset of the constraints; in many cases, the expected number of constraints still violated by that solution is then significantly smaller than the overall number of constraints that remain. This phenomenon can be ex...