The word statistics has three different meanings (sense) which are discussed below: (1) Plural Sense: (2) Singular Sense: For Example: If we want to have a study about the distribution of weights of students in a certain college. First of all, we will collect the information on the weights which may be obtained from the records of the college or we may collect from the students directly. The large number of weight figures will confuse the mind. In this situation we may arrange the weights in groups such as: “50 Kg to 60 Kg” “60 Kg to 70 Kg” and so on and find the number of students fall in each group. This step is called a presentation of data. We may still go further and compute the averages and some other measures which may give us complete description of the original data. (3) Plural of Word “Statistic”: For Example: If we select 15 student from a class of 80 students, measure their heights and find the average height. This average would be a statistic. |
(Kinds or Branches Statistics) |