Results 31 to 40 of about 5,869,389 (178)

Investigating the Effect of Missing Data on the Experimental Test of Mathematics for the Second-Secondary Students

open access: yesJournal of Educational, Cultural and Psychological Studies, 2022
This study aimed to uncover the effect of the missing values using the Rasch model on an experimental test of mathematics for the second-secondary students.
Aiman Mohammad Freihat
doaj   +1 more source

A simple test for normality for time series [PDF]

open access: yes, 2004
This paper considers testing for normality for correlated data. The proposed test procedure employs the skewness-kurtosis test statistic, but studentized by standard error estimators that are consistent under serial dependence of the observations.
Lobato, Ignacio N., Velasco, Carlos
core   +3 more sources

Comparison of Propensity Score Weighting Methods to Remove Selection Bias in Average Treatment Effect Estimates

open access: yesInternational Journal of Turkish Education Sciences, 2023
In this Monte Carlo simulation study, the performance of six different propensity score methods implemented through weighting cases was investigated: inverse probability of treatment weighting, truncated inverse probability of treatment weighting ...
Sungur Gürel, Walter Lana Leite
doaj   +1 more source

A fixed count sampling estimator of stem density based on a survival function

open access: yesJournal of Forest Science, 2015
In fixed count sampling (FCS) a fixed number (k) of observations is made at n randomly selected sample locations. For estimation of stem density, the distance from a random sample location to the k nearest trees was measured.
S. Magnussen
doaj   +1 more source

In-class activity comparing standard errors as a function of sample size with SPSS [PDF]

open access: yesTutorials in Quantitative Methods for Psychology, 2020
This vignette presents an in-class demonstration to introduce the notion of standard error. The students must be able to compute means using SPSS. They must also be able to eye-ball standard deviation from a list of numbers.
Cousineau, Denis
doaj   +1 more source

Improved method for assessing incidence of Citrus tristeza virus in large scale monitoring

open access: yesPhytopathologia Mediterranea, 2015
Citrus tristeza virus (CTV) induces typical quick decline when citrus trees are grafted onto the sour orange. The virus is efficiently vectored by different aphid species. Large scale CTV monitoring and eradication requires a precise sampling and testing
Anna Maria D'ONGHIA   +6 more
doaj   +1 more source

K-NCT: Korean Neural Grammatical Error Correction Gold-Standard Test Set Using Novel Error Type Classification Criteria

open access: yesIEEE Access, 2022
Recently, active research has been conducted on Korean grammatical error correction on machine translation (MT) and automatic noise generation. However, there is no gold-standard test set for objective and official comparative analysis.
Seonmin Koo   +6 more
doaj   +1 more source

All-optical logic circuits based on polarization properties of nondegenerate four-wave mixing [PDF]

open access: yes, 2001
All-optical logic circuits based on the polarization properties of nondegenerate four-wave mixing are proposed. Schemes to perform multiple triple-product logic functions are discussed, and it is shown that higher-level Boolean operations that involve ...
Bhardwaj, Ashish   +2 more
core   +2 more sources

Computation of Standard Errors [PDF]

open access: yesHealth Services Research, 2013
ObjectivesWe discuss the problem of computing the standard errors of functions involving estimated parameters and provide the relevant computer code for three different computational approaches using two popular computer packages.Study DesignWe show how to compute the standard errors of several functions of interest: the predicted value of the ...
Dowd, B., Greene, William, Norton, E.
openaire   +3 more sources

The One Standard Error Rule for Model Selection: Does It Work?

open access: yesStats, 2021
Previous research provided a lot of discussion on the selection of regularization parameters when it comes to the application of regularization methods for high-dimensional regression.
Yuchen Chen, Yuhong Yang
doaj   +1 more source

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