Helping Hands

Types of Statistics
Descriptive Statistics		Inferential Statistics
Descriptive statistics that branch of statistics which deals with concepts and methods concerned with summarization and description of the important aspects of numerical data. This area of study consists of the condensation of data, their graphical display and computation of the few numerical quantities that provides information about the centre spread of the observations. Examples: 1.A Statistician records Population growth of Punjab. 2.Pakistan Railway issue figures about the number of accidents and the number of deaths for the year 1990-91. 3.A Statistician reports the number students appeared in an examination and the number of students passed. 4.A business man makes use of descriptive statistics to present their annual account and reports.		Inferential statistics deals with procedure for making inferences about the characteristic of the knowledge drive from only a part of the data (known as a sample) this area (branch, types) includes the estimation of Population Parameters and testing of Statistical hypothesis. This branch of statistics is based on Probability theory because the inference cannot be absolutely certain. Examples: 1.   A Statistician wants to study the relationship between the cigarette smoking and the heart diseases. 2.   A statistician studies whether an increase in traffic density, increase the accident rate. 3.   A statistician wants to study the utility of coaching on the success of the students in CSS Examination.