"Data Collection" Data Collection and Processing PPT Courseware 2

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"Data Collection" Data Collection and Processing PPT Courseware 2

1: The school launched Sunshine Sports, and 60 students from Class 7 (3) responded positively. They quietly drew a statistical chart of the class’s participation in sports events, and asked the students to find out the specific number of people in each event.

Table tennis: 60×15%=9

Basketball: 60×35%=21

Skipping rope: 60×20%=12

Volleyball: 60×20%=12

Others: 60×10%=6

The earth we live in is full of crises. Food, energy, population...each of them has pushed human development into difficulties. As the source of life, water has undoubtedly become the largest crisis in the world.

Since 2011, precipitation in Jiangxi Province has continued to be low. As of now, Poyang Lake is experiencing a severe drought. At the turn of spring and summer, Poyang Lake, which was supposed to be rippling blue waves, turned into a grassland. Fish have lost their spawning grounds, submerged plants have lost their chance to germinate, and the rations of winter migratory birds are in jeopardy... Poyang Lake is experiencing a major drought test.

In today's lesson, let us focus on issues related to water conservation.

Inquiry: How to collect data? What are the steps?

1. Clarify the investigation problem---investigate the water situation

2. Determine the objects of investigation----investigate every student in our class

3. What survey method - choose questionnaire survey method

4. Conduct a survey - students fill in the questionnaire

5. Collect and organize data - students vote by show of hands

6. Analyze data and draw conclusions

summary:

data is useful

Data helps us make reasonable decisions and also helps us discover some interesting phenomena or facts.

Methods of collecting data

Public opinion polling method, field investigation method, media inquiry method, etc.

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Update Time: 2024-11-23

This template belongs to Mathematics courseware Beijing Normal University eighth grade mathematics volume 2 industry PPT template

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