"Data Collection" Data collection and organization PPT

Description

"Data Collection" Data collection and organization PPT

Part One: Learning Objectives

1. Experience the process of collecting data and understand the specific methods and basic requirements of data collection;

2. Collection and organization of data, including simple classification, sorting and group coding;

Data collection PPT, part 2: independent learning feedback

1.What method will you use to collect the following data?

①The number of bicycles in the school parking area;

②The vision of students in our class;

③Which subject do my classmates like the most?

④The temperature change of a certain amount of water when heated;

⑤The number of gold medals won by China in the Olympic Games over the years

2. During the physical examination, the doctor tested the body temperature of a certain group of students and showed the following: 37°C, 37.1°C,

37.2 ℃, 36 ℃, 37 ℃, 37.3 ℃, 37 ℃. How did the doctor collect this set of data?

3. How can we learn about the relevant data of the Chang'e-3 lander and the "Yutu" lunar rover?

4. A website conducted a survey on the popularity of Wufuwa by netizens, and 145,964 people participated in the vote. The website compiled the specific data on netizens’ love for the mascot and published the statistical results in the following table:

Data collection PPT, the third part: new knowledge explanation

Problem Situation Xiaoying wanted to know the water consumption situation in Lanzhou City, and got the following statistical chart

What information did you get from Xiaoli’s statistical chart?

Exploration 1 Xiao Ming wanted to know whether the people around him were aware of water conservation, so he created a questionnaire

Discuss

What are the general processes involved in engaging in statistical activities?

what are you doing? ——Know whether the people around you are aware of water conservation

From whom? ——Carry out surveys in the community/class

How to know? --individual? Or investigate them all? From what aspects

How to investigate? ——Inquiry in person? Questionnaire? Phone interview? …

Follow-up work after investigation completion

Thoughts and opinions after investigation

Data collection PPT, part 4: in-class testing

1. Which of the following statements about sample surveys is incorrect ( ).

A. The advantage of a sampling survey is that the scope of the survey is small and it saves time, manpower and material resources.

B. The results of sample surveys are generally not as accurate as those obtained by census

C． The number of surveyed objects during a sample survey should not be too few.

D. Surveying 60% of individuals will ensure accurate results

2． To investigate whether the study burden of students in a certain school is too heavy, the following method is most appropriate ( ).

A. Consult literature B. Survey on students

C． Search online D. Questionnaire survey on school leaders

3. To investigate whether China needs to build an "aircraft carrier" to support the national people, is this survey suitable for sampling?

4． In order to obtain more accurate survey results in a sampling survey, attention should be paid to the _________ and _________ of the sample when sampling.

Data collection PPT, part 5: applying what you learn

There was the following investigation: ① In order to know whether the soup in the pot was salty, Xiao Ming's mother took a small spoonful of soup out of the pot and tasted it; ② In order to understand the overall condition of the rice ears, Xiao Ming's mother randomly selected a piece of rice field. Several areas were sampled; ③ When a pastry factory checked the quality of pastries, it took a bag every 10 minutes from a production line, with a total of 10 bags as a sample; ④ In order to understand the environmental pollution situation in a certain city, a steel factory was investigated The environmental pollution situation nearby and the environmental pollution situation in a residential area.

The samples selected above are suitable ( ).

A. 1 B. 2

C． 3 D. 4

Data collection PPT, Part 6 content: Class summary

Data collection methods

Direct methods: observation, measurement, investigation, experiment, etc.

Indirect methods: Internet search, literature review, etc.

Data collection PPT, Part 7: Personalized assignments

1. Complete the after-school homework of Group A of 6.1 Data Collection.

2. Preview the basic concepts of census and sample survey on pages 162-163 of the textbook, and complete the independent learning and testing questions in the next section.

1. Complete the after-school homework of Group B in 6.1 Data Collection.

2. Preview the basic concepts of census and sample survey on pages 162-163 of the textbook, and complete the independent learning and testing questions in the next section.

Keywords: Free download of Beijing Normal University version of seventh grade mathematics volume 1 PPT courseware, data collection PPT download, data collection and organization PPT download, .PPT format;

For more information about the PPT courseware "Data Collection and Organizing Data Collection", please click the Data Collection and Organizing PPT Data Collection PPT tab.

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Update Time: 2024-11-22

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