Simple Rule of thumb, what does rule of thumb mean?

The rule of thumb, also known as the 3-sigma rule or principle, is used to quickly extrapolate normally distributed data with known means and standard deviations.

In statistics, the rule of thumb is that in a pure normal distribution, the percentage within one standard deviation of the mean, two standard deviations, and three standard deviations from the mean, and the more precise number is45% and.

The rule of thumb is most often used in statistics for the final result. The rule serves as a rough estimate of the upcoming data results until the standard deviation of the data is obtained, and until definitive data can be collected.

This probability is especially useful for data that requires a lot of time to collect, even data that is impossible to obtain.

The rule of thumb is a statistical law that states that in a normal distribution, almost all data will fall within three standard deviations of the mean. The rule of thumb states that 68% of the data will be spread within the first standard deviation, 95%, and will fall within the first three standard deviations of the mean.

The rule of thumb is most often used in statistics for the final result. The rule can be used as a rough estimate of the outcome of the upcoming data until the standard deviation of the data is obtained, and until the exact data can be collected. This probability is especially useful for data that takes a lot of time to collect, or even that is impossible to obtain.

Rules of thumb can be divided into special rules of thumb and general rules of thumb depending on whether they are generally known to people or not.

Note: Article 9 The parties do not need to present evidence to prove the following facts:

a) well-known facts;

2) the laws and theorems of nature;

3) Another fact that can be inferred on the basis of legal provisions or known facts and rules of experience in daily life;

4) Facts that have already been confirmed by a legally effective judgment of the people's court;

5) Facts that have been confirmed by the effective award of the arbitration institution;

6) Facts that have been proved by valid notarized documents.

Except in items (1), (3), (4), (5), and (6) of the preceding paragraph, the parties have evidence to the contrary that is sufficient to overturn it.

Article 9(3) of the Several Provisions of the Supreme People's Court on Evidence in Civil Proceedings stipulates that another fact that can be deduced from the provisions of the law or known facts and the rules of thumb in daily life does not need to be proved by adducing evidence.