"Census and Sampling Survey" data collection and arrangement PPT teaching courseware

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"Census and Sampling Survey" data collection and arrangement PPT teaching courseware

Part One Content: Basic Knowledge Key Points

Knowledge point 1: Census and sample survey

1. Among the following surveys, the census method is suitable (D)

A. Survey on the quality of rice dumplings on the market during the Dragon Boat Festival

B. Investigation of the water quality of the Yellow River

C. Adjustment of low-carbon living conditions for citizens of our city

D. Inspection of various parts of my country’s first large passenger aircraft C919

2. Among the following investigation methods, the more appropriate one is (D)

A. In order to understand the vision status of primary and secondary school students in Shenzhen, a census is used

B. In order to understand the extracurricular reading situation of primary and secondary school students in Longgang District, a census was adopted

C. In order to understand the mathematics scores of students in the seventh grade (2) class of a certain school in the final exam, a sample survey was used

D. In order to understand the city’s citizens’ understanding of fire safety knowledge, a sampling survey was adopted

3. The following survey work is suitable for sampling survey method: ①③④⑥　(fill in the serial number).

① Lijin County Environmental Protection Department’s investigation of water pollution in the Yellow River waters within its jurisdiction;

② To ensure the successful launch of the "Shenzhou-6" manned spacecraft, inspect important parts;

③Understand the service life of a batch of light bulbs;

④ Understand the sleep status of junior high school graduates across the country;

⑤The company conducts a size survey before making work clothes for employees;

⑥The TV station’s survey on the ratings of a certain TV program being broadcast.

Knowledge point 2: Population, individual, sample

4. In order to understand the distribution of scores in each section of the mathematics subject of the high school entrance examination in Changsha City in 2019, the mathematics scores of the high school entrance examination of 400 candidates were selected for statistical analysis. In this question, the sample refers to (C)

A. Changsha City’s 2018 high school entrance examination mathematics scores

B. 400 candidates selected

C. The mathematics scores of the 400 selected candidates for the high school entrance examination

D.400

5. (Adapted) 800 students in the third grade of a middle school participated in the physical education test of the high school entrance examination. In order to understand the physical education test scores of these students, the physical education test scores of 80 students were selected and analyzed. The following statement is correct (B)

A. These 80 students are a sample of the population

B. Each student’s physical education test scores are individual

C. The physical education test scores of 80 students are the overall

D.800 students are the population

Census and sample survey PPT, part 2: improvement of comprehensive capabilities

8. Among the following investigation methods, which one is inappropriate (C)

A. In order to understand the height status of middle school students across the country, a sample survey is used

B. Use a sampling survey on the service life of a certain model of electronic products

C. In order to understand whether a batch of bagged food contains preservatives, a comprehensive investigation is conducted

D. In order to understand people’s awareness of water resource protection, a sampling survey is used

9. The average daily turnover of a shopping mall during the National Day holiday is 150,000 yuan. From this, the total turnover in October is estimated to be approximately 15×31=465 (10,000 yuan). Do you think this inference is reasonable? Answer : Unreasonable because the sampling is not representative.

10. There are 4,600 students in a middle school. In order to understand the students’ favorite extracurricular sports, the school randomly checked 200 students. Among them, 85 students said that their favorite activity was rope skipping. It can be estimated that among the students in the school There are 1955 students whose favorite extracurricular sport is skipping.

11. Indicate which investigation method is appropriate for the following investigations:

(1) A survey conducted to find out the number of students in the class who watched the program "Run! Brothers";

(2) In order to understand the physical development of middle school students, a survey was conducted on the height of seventh-grade boys across the country;

(3) Investigation to understand the duration of efficacy of a batch of drugs;

(4) A survey conducted to understand the epidemic situation of "Influenza A" across the country.

Census and sample survey PPT, the third part: Expanding exploration and breakthroughs

14. In order to build a harmonious, safe and beneficial society, the district government widely solicited opinions from residents on hot social issues by issuing questionnaires, requiring each respondent to write only one issue that they are most concerned about. According to the survey statistics, the following is obtained The statistical chart shown in the figure.

(1) Is this survey a census or a sample survey?

(2) Among the questionnaires that are known to be recovered, 540 have expressed opinions on social security. How many questionnaires have been collected in total this time?

(3) How many more people raise road traffic issues than environmental protection issues?

(4) Please use one or two sentences to talk about your thoughts on the results of this survey.

Solution: (1) Sampling survey.

(2) It is known that 540 of the returned questionnaires expressed opinions on social security, accounting for 45% of the returned questionnaires. Therefore, a total of 540÷45%=1200 (copies) of questionnaires were returned this time.

(3)1200×(25%-20%)=60(people), so there are 60 more people raising road traffic issues than environmental protection issues.

(4) The answer is not unique. For example, citizens have greater opinions on social security and are more satisfied with environmental protection.

Keywords: Beijing Normal University edition seventh-grade mathematics PPT courseware free download, census and sample survey PPT download, data collection and arrangement PPT download, .PPT format;

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Update Time: 2024-11-24

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