PERBANDINGAN TEKNIK BERGRAF UNTUK DATA BERKATEGORI
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Date
2002-02
Authors
PING, HOO LING
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Abstract
Graphical methods for categorical data are still in the period of infancy. Not
many graphical methods have been introduced. Besides, methods which are discussed
in the literature are not available in nowadays statistics software. Thus, graphical
methods for categorical data are not used widely.
Therefore, this dissertation aims to introduce the concept for two types of
graphical methods, which are suitable for the interpretation of categorical data. The two
types of graphical methods are correspondence analysis and mosaic display. Next, the
results from the two methods will be compared.
Correspondence analysis analyzes the relationship between not only two
categories of discrete variable but also for several categories at the same time. It
displays the results visually as points within a two-dimensional space that facilitates
interpretation. Mosaic display is a graphical method for n-way contingency tables. It
presents each cell directly or indirectly with tiles and the areas are proportional to the
cell frequencies.
For this dissertation, an analysis of a survey using videotape as an alternative to
present the courses to the students of The School of Distance Education, USM has been
carried out. By using the methods of correspondence analysis and mosaic display, we
have found that in video 1 and video 2, too many difficult concepts are introduced.
Video 3, video 4, video 5 and video 6 are suitable for presentation.
From the research that have been done, the. methods of correspondence analysis
and mosaic display can be used to present the relationships of variables from
categorical data during the initial stage before further study is done.
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PERBANDINGAN TEKNIK BERGRAF UNTUK DATA BERKATEGORI