INDIAN STATISTICAL SERVICES(ISS) entrance classes special online session study materials
The Indian Statistical Service (abbreviated as ISS) (Hindi: भारतीय सांख्यिकी सेवा) is an organized Group-A Central Civil Services of the executive branch of the Government of India.ISS is a technical service with high degree of proficiency in Statistical methods and applications. With the main mandate of producing quality Official Statistics with better methods and techniques, provide solutions to the data and information needs and interpretation and analysis of statistics, a majority portion of the probationary training programme is to be devoted to acquiring of technical knowledge in the field of official statistics, economics, financial statistics, survey methodology etc. The posts are recruited through UPSC examination.
The minimum eligibility criterion is Bachelor’s degree with Statistics or Mathematical Statistics or Applied Statistics as one of the subject. Statistics is the discipline that concerns the collection, organization, analysis, interpretation and presentation of data.In applying statistics to a scientific, industrial, or social problem, it is conventional to begin with a statistical population or a statistical model to be studied. Populations can be diverse groups of people or objects such as "all people living in a country" or "every atom composing a crystal". Statistics deals with every aspect of data, including the planning of data collection in terms of the design of surveys and experiments. When census data cannot be collected, statisticians collect data by developing specific experiment designs and survey samples.
Representative sampling assures that inferences and conclusions can reasonably extend from the sample to the population as a whole. An experimental study involves taking measurements of the system under study, manipulating the system, and then taking additional measurements using the same procedure to determine if the manipulation has modified the values of the measurements. In contrast, an observational study does not involve experimental manipulation.