IS/ISO 28640 : 2010 : Random Variate Generation Methods

NATIONAL FOREWORD

This Indian Standard which is identical with ISO 28640 : 2010 ‘Random variate generation methods’ issued by the International Organization for Standardization (ISO) was adopted by the Bureau of Indian Standards on the recommendation of the Statistical Methods for Quality and Reliability Sectional Committee and approval of the Management and Systems Division Council.

This standard specifies typical algorithms by which the users can regard the generated numerical sequences as if they were real random variates. Nowadays most statisticians, scientists and engineers have enough computer power at their disposal to carry out large computer simulations, and it is important that these be based on sound pseudorandom generators.

This standard has been developed to help ensure that randomization, where needed, is carried out correctly and efficiently.

Six uses of randomization can be identified in statistical standardization:

— selection of a random sample,

— analysis of sample data,

— development of standards,

— checking theoretical results,

— demonstrating that a proposed procedure has the properties claimed of it, and

— resolving uncertainty in the statistical literature.

The text of ISO Standard has been approved as suitable for publication as an Indian Standard without deviations. Certain conventions are, however, not identical to those used in Indian Standards. Attention is particularly drawn to the following:

a) Wherever the words ‘International Standard’ appear referring to this standard, they should be read as ‘Indian Standard’.

b) Comma (,) has been used as a decimal marker while in Indian Standards, the current practice is to use a point (.) as the decimal marker.