Question

What is the Common Rule in probability and statistics and why does it exist in the United States?

just need second thought will give great comments and feedback (:

Answer 1

There are a phenomenon that occur in our day to day life which donot lend themselves to deterministic approach and are known as "unpredictable" or "probabilistic" phenomenon . Like in random toss of uniform coin we are not sure of getting head or tail, a sales manager cannot predict with certainity about the sales target next year and so on.Note that deterministic models are one in which the result can be predicted with certainity eg. v=u+rt(Newton's law).This makes the use of probability.

Statistics is defined as the science that deals with the collection, classification, analysis and interpretation of numerical facts or experimental data or real life studies.

The common rule of probability and statistics are like of them are defined on uncertainities. In both case we only say something with certain uncertainty associated with it though we know the whole set of values out of which certain outcome is going to occur. Example a fair dice is thrown ,we know that either 1 wil occur or 2 or 3or 4or 5 or 6. But exactly what among them is going to occur in the given trial is uncertain ,the occurance of each outcome has probability of occurance equal to 1/6.Similarly in statistics, when applying it to day to day life, the experiment cannot be performed in controlled situation there is always uncertainty associated, we collect data that may b representative may be not, compile it , analyse it and interpret it. Like if the 10 fair dices are thrown 20 times and outcomes are noted, again another student perform the same experiment and notes downe the outcome .Even if the process performed under same set of conditions it is not necessary that the data obtained in both case is same. This is probabilistic approach to statistics.

United States is one of the developed nations of the world advanced with respect to technology, applications and even in field of artificial intelligence. US collects millions of data each second, compiles data from various sources , analyse it and interpret as well as use the information from it efficiently. The statistical models are applied for various predictions like wjether, stock marketing, country's GDP etc, statistical quality control techniques are used in quality control for imports and exports.