QMT 181 Chapter 1

Chapter 1: Introduction of Statistics

What is Statistics?

1.1 Statistics is a systematic study of identifying patterns, measuring, displaying, summarizing and            modelling in order to gain knowledge from a data set.


1.2 Statistics can be classified into two types of namely" descriptive and inferential statistics.

     1.3  Source of Data.

   

• Can be classified  into two categories " Primary and Secondary Data".   

      1.4 Types of Variable

     - Variable can be defined as any characteristics that can be measured from an element.
       There are two types o variable:

• Quantitative
• Qualitative   

     

     

     1.5   Scale of Measurement

      Scale of measurement refer to the ways in which variables are defined and categorized.

      There are 4 scale of measurement

   

           i) Nominal

          ii) Ordinal

         iii) Ratio

         iv) Interval