Articles with "variance covariance" as a keyword



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Large-scale estimation in Rasch models: asymptotic results, approximations of the variance–covariance matrix of item parameters, and divide-and-conquer estimation

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Published in 2018 at "Behaviormetrika"

DOI: 10.1007/s41237-018-0046-z

Abstract: Rasch-type item response models are often estimated via a conditional maximum-likelihood approach. This article elaborates on the asymptotics of conditional maximum-likelihood estimates for an increasing number of items, important for modern data settings where a… read more here.

Keywords: large scale; estimation; approximations variance; variance covariance ... See more keywords
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Novel Pythagorean Fuzzy Correlation Measures Via Pythagorean Fuzzy Deviation, Variance, and Covariance With Applications to Pattern Recognition and Career Placement

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Published in 2022 at "IEEE Transactions on Fuzzy Systems"

DOI: 10.1109/tfuzz.2021.3063794

Abstract: Pythagorean fuzzy set (PFS) is a significant soft computing tool for tackling embedded fuzziness in decision-making. Many computing methods have been studied to facilitate the application of PFS in modeling practical problems, among which the… read more here.

Keywords: fuzzy deviation; pythagorean fuzzy; deviation variance; correlation ... See more keywords