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What are the disadvantages of data-transformation over rank-order

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December 5th, 2012 14:28
in Statistics for Psychologists by jugnu900 (Oglala Lakota College (SD), Mechanical Engineering)

What are the disadvantages of data-transformation over rank-order tests?

Hello to everybody, please explain the Dis Advantages  of Parametric test.

6 Answers
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December 18th, 2012 15:42
juno (University of Strathclyde, Finance)
"They will not always work and may distort the underlying meaning of the measurement"

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January 30th, 2013 14:07
samuey (Anna University of Technology, Mechanics)
"Data changes are widely used resources that can provide many features in quantitative research of information. The objective of this document is to pay attention to the use of three information changes most generally mentioned in research text messages (square main, log, and inverse) for helping the normality of factors. While these are important options for experts, they do essentially convert the characteristics of the varying, making the presentation of the results somewhat more complicated. Further, few (if any) mathematical text messages talk about the remarkable impact a distribution's lowest value has on the effectiveness of a modification. The objective of this document is to advertise careful and advised use of information changes. "

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February 17th, 2013 05:21
radheya (Allahabad University, Science and engineering)
Once information and information are documented and available at school, illustrative research can be created to review the information, to explain the situation, and to recognize problems and aspects.

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February 24th, 2013 08:15
senajit_98 (Aliah University, Aerospace engineering)
"Data transformations are the application of a mathematical modification to the values of a variable. There are a great variety of possible data transformations, from adding constants to multiplying, squaring or raising to a power, converting to logarithmic scales, inverting and reflecting, taking the square root of the values, and even applying trigonometric transformations such as sine wave transformations. The goal of this paper is to begin a discussion of some of the issues involved in data transformation as an aid to researchers who do not have extensive mathematical backgrounds, or who have not had extensive exposure to this issue before, particularly focusing on the use of data transformation for normalization of variables. "

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February 24th, 2013 13:16
seshadri_44het (West Bengal State University, Engineering)
"The credibility of many mathematical assessments relies on the supposition that toxins from a fixed design are normally allocated (Berry 1993). In comparison, many complicated attributes analyzed in genes have considerably non-normal withdrawals (Micceri 1989; Allison et al. 1999), which in many situations indicates non-normal toxins. Several techniques are available to reply to non-normality, such as but not restricted to dependency on asymptotic qualities (Mehta et al. 2004), modification of the information (Etzel et al. 2003; Henry and Elston 1987; Shete et al. 2004;  et al. 2006), and the use of nonparametric assessments (Neave and Wothington 1989), which subsumes the research of position information (e.g., Zak et al. 2007), permutation assessments, and bootstrap techniques as unique situations (Good 1999). "

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February 24th, 2013 17:04
shafiqul_877b (All India Institute of Medical Sciences, Biotechnology)
"Many mathematical techniques believe that the factors are normally allocated. A important breach of the supposition of normality can seriously improve the possibilities of the specialist choosing either a Type I or II mistake (depending on the characteristics of the research and the non-normality). However, Micceri (1989) factors out that real normality is extremely unusual in knowledge and mindset. Thus, one purpose (although not the only reason) scientists implement information changes is helping the normality of factors. Furthermore, writers such as Zimmerman (e.g., 1995, 1998) have outlined that non-parametric assessments (where no precise supposition of normality is made) can experience as much, or more, than parametric assessments when normality presumptions are breached, verifying the significance of normality in all mathematical studies, not just parametric studies. "

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