Mr. Xie Bangchang's article on statistics and life is a bit, talking about statistics and life laws, his approximate views are as follows:
First, the average - the medium rule
The average is a centralized trend representing a group characteristic. Everything in life should be the rule of the midburs, which should not be too self-expanded, and it is not advisable to have dwarf.
think:
Representative of the average --- is not biased;
The effectiveness of the average --- in two uses;
Central limit - adhere to the mean;
The average simplification of the average --- Jinding.
Second, the number of variation ---
The number of variability refers to the degree of mutual difference in group characteristics. Life is also high and low, so-called "the world is rugged, people are sinister". We must have a vigilance of "home", careful care.
think:
The accumulation of errors --- Be cautious;
Error spread - preventing no longer;
Prevent error from enlargement - grasp the focus;
Designed in advance --- Stained;
Test, correct the error - cut multiple inspection points.
Third, random sampling --- Fair law
Random sampling, that is, under limited human, financial resources, with less samples, to speculate on a large number of groups. There are many things in life that can be treated with a random sampling method, with a lesson half-time.
think:
Representative of random sampling - see Ido;
The same opportunities for random sampling - fairness;
Random sampling uncertainty --- do personality, listen to life;
Large observation, reliability increase - multi-party payment;
Random samples, each variable is independent of each other - the personality is superficial;
Sampling errors cannot be avoided - seeking its hearts.
Fourth, normal allocation --- Natural law
In the most important consecutive race rate allocation in statistics, the graphics are called normal curves (clock-shaped), and there are many data in nature, and they are described in this curve. Life should be nature, self-improvement, and should establish a central belief to consider the pointer.
think:
The origin of normal allocation --- compliant nature;
Universality of normal allocation - 取 中 中;
The polarization and peak degree of normal allocation - not humble;
The range of normal allocation - there is a lot.
Comprehensive, the inspiration of statistically giving us the wisdom of life is:
On average - the medium of the medium is thought to be people.
Variation --- Be cautious to act.
Random --- The spirit of fairness is in the world.
A large number of observations - round the attitude is truthful.
Normal --- Chongjing naturally thought the law.
