1, statistical data, are digital data and related text descriptions that reflect the state and regularity of a large number of phenomena.
2. Statistical work is about collecting, sorting out, analyzing and inferring statistical data in order to explore the nature and laws of things.
3. Statistical science is a theory and method to study how to collect, sort out and analyze quantitative data of a large number of phenomena and infer their essence and regularity, such as socio-economic statistics and mathematical statistics.
Second, probability, also known as "probability", reflects the possibility of random events. Random events refer to events that may or may not occur under the same conditions. For example, it is a random event to randomly select one from a batch of goods with genuine products and defective products, and "what is extracted is genuine products".
Extended data:
I. Probability events
Events that may or may not occur under certain conditions are called random events.
Usually, an event in an experiment consists of basic events. If an experiment has n possible results, that is, the experiment consists of n basic events, and all the results are equally likely to appear, then such events are called allelic events.
Mutually exclusive events: Two things that cannot happen at the same time are called mutually exclusive events.
Antagonistic event: that is, there must be a mutually exclusive events called antagonistic event.
Second, the statistical characteristics
1, total
The cognitive object of statistics is the overall quantitative aspect of social and economic phenomena. Studying the number of social and economic phenomena as a whole is a main feature that distinguishes statistics from other social sciences. For example, the gross national economy, social gross, regional gross national economy and society, enterprises and institutions and so on.
2. Specificity
The cognitive object of socio-economic statistics is the quantitative aspect of concrete things, not the abstract quantitative relationship. This is the difference between statistics and mathematics.
3. Sociality
Socio-economic phenomenon is a conscious social activity of human beings, and it is the condition, process and result of human social activities. Socio-economic statistics takes socio-economic phenomena as the research object and has obvious sociality. Statistics studies social and economic phenomena, which is different from natural statistics and technical statistics.
Baidu encyclopedia-probability
Baidu Encyclopedia-Statistics