The need for a revised lower limit for the 4253H, Twice nonparametric smoother

Velleman and Hoaglin (1981) describe the nonparametric smoother 4253H,Twice which uses a combination of running medians and Hanning to smooth data sequences. Velleman and Hoaglin (1981) suggest that the minimum sample size recommended for this nonparametric smoother is seven. A proof and working exa...

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Bibliographic Details
Published inStatistics & probability letters Vol. 32; no. 3; pp. 269 - 272
Main Authors Janosky, J.E., Pellitieri, T.R., Al-Shboul, Q.M.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 15.03.1997
Elsevier
SeriesStatistics & Probability Letters
Subjects
4253H,Twice smoother
Nonparametric smoothing
Nonparametric smoothing 4253H
Twice smoother
Nonparametric smoothing
4253H,Twice smoother
Online AccessGet full text
ISSN0167-7152
1879-2103
DOI10.1016/S0167-7152(96)00083-1

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Summary:Velleman and Hoaglin (1981) describe the nonparametric smoother 4253H,Twice which uses a combination of running medians and Hanning to smooth data sequences. Velleman and Hoaglin (1981) suggest that the minimum sample size recommended for this nonparametric smoother is seven. A proof and working example presented here suggest that the recommended minimum data points should be higher than seven.
ISSN:0167-7152
1879-2103
DOI:10.1016/S0167-7152(96)00083-1