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Pair comparing method
Swedish National Road and Transport Research Institute.
2004 (English)Report (Other academic)
Abstract [sv]

When studying how a response variable depends on an explanatory variable it

is convenient to create pairs of matched observations, i.e. pairs consisting

of two observations that are homogenous, except for the studied explanatory

variables and the response variable. So, the matching procedure is a method

with the purpose to control for different nuisance variables. Normally the

analysis of such studies is straightforward, but it is possible to complicate

it. Usually an expert that is not necessarily a statistician creates the

matched pairs. In that case it is also customary that this expert finds one

pair member suitable in several pairs, which means trouble for the analysing

statistician. The expert understanding for the statistical problems is

however limited in most cases. Therefore it has been necessary to develop a

statistical method for analysing the results from a study with matched pairs,

where it is allowed for an observation unit to be member of several pairs. An

obvious consequence of that is that results from pairs with one common pair

member will be dependent. It is therefore necessary to formulate an analysing

method that is applicable when there are dependencies between different

pairs. Another consequence from allowing the same object to occur in several

pairs is that it may lead to a data set with redundancy. This would be the

situation if objects a and b form one pair, a and c another and finally b and

c a third pair. The third pair is just the difference between the two firsts.

Then it is necessary to find a method that remove redundant pair like b and c

as well.

Place, publisher, year, edition, pages
Linköping: Statens väg- och transportforskningsinstitut., VTI rapport 495A , 2004.
VTI rapport, ISSN 0347-6030
Keyword [en]
English, Sweden, Mathematical model, Statistics, Method, Variability
Research subject
Road: Traffic engineering, Road: Traffic theory
URN: urn:nbn:se:vti:diva-6370OAI: diva2:675247
Available from: 2013-12-03 Created: 2013-12-03 Last updated: 2013-12-03

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Wiklund, Mats
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