In order to make the sample correctly reflect the overall situation, the overall situation should be clearly defined; All observation units in the population must be homogeneous; In the process of sampling, the principle of randomization must be observed; There should be enough sample observation units.
1. Books printed as samples. Gu and Li Liangnian wrote in the Qing Dynasty: "If you are late, the Qi of the Sun has been carved into a sample book, and I will send you a special copy."
2 printed books or publications are designed for advertising or soliciting opinions.
Regulations on the Administration of Extended Materials Publication Article 10 The administrative department of publishing in the State Council shall formulate the total number, structure and layout planning of publishing units throughout the country, and guide and coordinate the development of publishing industry and publishing undertakings.
Article 11 The establishment of a publishing entity shall meet the following conditions:
(1) Having the name and articles of association of the publishing entity;
(two) there are organizers and their competent departments that meet the requirements of the administrative department of publishing in the State Council;
(3) Having a definite business scope;
(4) Having a registered capital of more than 300,000 yuan and a fixed workplace;
(5) Having an organization meeting the needs of its business scope and editing and publishing professionals meeting the qualifications prescribed by the state;
(6) Other conditions stipulated by laws and administrative regulations.
The examination and approval of the establishment of a publishing unit shall not only meet the conditions listed in the preceding paragraph, but also conform to the state's plan on the total number, structure and layout of publishing units.
Regulations of the State Administration of Radio, Film and Television on the Administration of Publication (revised on 20 16)