Statistical Analyses and Interpretation of Data


  • Mulugeta Gebreselassie Lecturer, Department of Statistics


Any statistical investigation involves four important stages: data
collection, data organization, data analysis and interpretation or
inference. This deals with one aspect of the four main stages of
statistical investigation.
Before data analysis and interpretation it is mandatory to devise
procedures of collecting "quality" data. If there is any problem with the
quality of the data it is unthinkable to obtain precise results by
applying sophisticated methods of analysis.
A pre-requisite to obtain quality data is a good design of the data
collection instrument. This includes a good questionnaire design and
a good sampling design. Though the author feels that the prerequisite
topics are covered in previous training sessions, a mention of a
sampling design is relevant.