Results 1 to 10 of about 1,671,028 (162)

Does Systematic Sampling Preserve Granger Causality with an Application to High Frequency Financial Data? [PDF]

open access: yesEconometrics, 2018
In applied econometric literature, the causal inferences are often made based on temporally aggregated or systematically sampled data. A number of studies document that temporal aggregation has distorting effects on causal inference and systematic ...
Gulasekaran Rajaguru   +2 more
doaj   +4 more sources

A modified version of diagonal systematic sampling in the presence of linear trend. [PDF]

open access: yesPLoS ONE, 2022
Systematic sampling is one of the simplest and popular methods for selecting a random sample from a finite population. The diagonal systematic sampling scheme is a type of systematic sampling design which has gained the attention of researchers during ...
Muhammad Azeem
doaj   +2 more sources

An improved version of systematic sampling design for use with linear trend data [PDF]

open access: yesHeliyon, 2023
In survey sampling, systematic sampling design has attracted survey researchers in recent years due to its simplicity of use. We introduce a modified variant of systematic sampling scheme which improves the efficiency of a recently developed diagonal ...
Muhammad Azeem   +4 more
doaj   +2 more sources

Systematic sampling [PDF]

open access: yes, 2018
Carfagna, Elisabetta
core   +2 more sources

Tardigrades from Iztaccíhuatl Volcano (Trans-Mexican Volcanic Belt), with the Description of Minibiotus citlalium sp. nov. (Eutardigrada: Macrobiotidae)

open access: yesDiversity, 2020
The study of tardigrade diversity in Mexico is at early stage of development, to date, 56 extant species have been reported. To identify the tardigrade fauna associated with mosses in the Iztaccíhuatl volcano, we performed a systematic sampling along an ...
Alba Dueñas-Cedillo   +4 more
doaj   +1 more source

A PRELIMINARY STUDY OF SENTIMENT ANALYSIS ON COVID-19 NEWS: LESSON LEARNED FROM DATA ACQUISITION, PRE-PROCESSING, AND DESCRIPTIVE ANALYTICS

open access: yesBarekeng, 2023
Sentiment analysis is a method used to analyze opinions and feelings. The goal of sentiment analysis is to determine whether a document contains a positive or negative emotion.
Rahmatin Nur Amalia   +2 more
doaj   +1 more source

Factors influencing the adoption of conservation agriculture by smallholder farmers in KwaZulu-Natal, South Africa

open access: yesOpen Agriculture, 2022
The various efforts done to promote conservation agriculture (CA) in the Sub-Saharan Africa and the Republic of South Africa have diminished over time.
Nkonki-Mandleni Busisiwe   +2 more
doaj   +1 more source

Modified Systematic Sampling with Multiple Random Starts

open access: yesRevstat Statistical Journal, 2018
Systematic sampling has been facing two problems since its beginning; situational complications, e.g., population size N not being a multiple of the sample size n, and unavailability of unbiased estimators of population variance for all possible ...
Sat Gupta , Zaheen Khan , Javid Shabbir
doaj   +1 more source

Adequate Placental Sampling for the Diagnosis and Characterization of Placental Infection by Zika Virus

open access: yesFrontiers in Microbiology, 2020
The detection of Zika virus (ZIKV) in immunoprivileged anatomical sites, potential sites for viral persistence, may guide the confirmation of undefined cases of ZIKV infection and also bring to light unknown pathways of viral transmission.
Emanuella Meneses Venceslau   +39 more
doaj   +1 more source

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