An U pdate on D ata D istribution and T echniques of D ata T ransformation

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dc.contributor.authorNajmi, Ahmaden_US
dc.contributor.authorRay, Aviken_US
dc.date.accessioned2023-08-19T05:00:13Z
dc.date.available2023-08-19T05:00:13Z
dc.date.issued2022-12
dc.description.abstractThe distribution in biostatistics can be defined as distribution of frequencies of values of a given variable in a sample. Distribution can be broadly classified into normal and skewed distribution. Normal distribution is a symmetrical bell shaped curve. ±1 standard deviation covers 65% of values around median value and ±2 S.D. covers 95% of values around median value. Mean, median & mode are equal for normal distribution curve. Parametric test like t test a nd ANOVA are based on the assumption that the data follows normal distribution. In skewed or asymmetrical distribution, there is clustering of cases in either right side or left side of the curve. In right sided skewness, the tail of curve is on the right side. In left skewed distribution, th e tail is on the left side. Non - parametric test can be used in case of skewed data. Parametric test are more robust as compare to non - parametric test. The alternative is to transform the numerical variable into another scale where the values do satisfy the assumptions needed for the desired parametric or “normal” statistical methods. These technique include logarithm transformation, generalized linear modelling, and bootstrapping.en_US
dc.identifier.affiliationsAssistant Professor, Dept. of Pharmacology, AIIMS Bhopalen_US
dc.identifier.affiliationsAvik Ray, Masters student, Department of Epidemiology, Harvard T. H. Chan School of Public Health, Boston, USAen_US
dc.identifier.citationNajmi Ahmad, Ray Avik. An U pdate on D ata D istribution and T echniques of D ata T ransformation. Indian Journal of Medical Research. 2022 Dec; 8(4): 1-3en_US
dc.identifier.issn2454-9894
dc.identifier.issn2454-9886
dc.identifier.placeIndiaen_US
dc.identifier.urihttps://imsear.searo.who.int/handle/123456789/224051
dc.languageenen_US
dc.publisherIbn Sina Academy of Medieval Medicine & Sciencesen_US
dc.relation.issuenumber4en_US
dc.relation.volume8en_US
dc.source.urihttps://doi.org/10.21276/iabcr.20 2 2 . 8 . 4 . 1en_US
dc.subjectdata distributionen_US
dc.subjectdata transformationen_US
dc.titleAn U pdate on D ata D istribution and T echniques of D ata T ransformationen_US
dc.typeJournal Articleen_US
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