Beijing Normal University eighth grade mathematics volume 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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For more information about the "Data Collection and Processing Data Collection" PPT courseware, please click the Data Collection and Processing ppt Data Collection ppt tab.

"Data Collection and Arrangement" PPT:

"Data Collection and Organizing" PPT Part One: Data Collection How to obtain the data we need in life? 1. A website conducted a survey on the popularity of Wufuwa among netizens, and 145,964 people participated in the vote. The website’s love for the mascot among netizens...

"Data Fluctuation" Data Collection and Processing PPT Courseware 3:

"Data Fluctuation" Data Collection and Processing PPT Courseware 3 Problem Situation In order to improve the international competitiveness of agricultural and sideline products, some industry associations have divided the planning of agricultural and sideline products. A foreign trade company wants to export a batch of 75g chicken legs. There are currently 2 manufacturers providing...

"Data Fluctuations" Data Collection and Processing PPT Courseware 2:

"Data Fluctuation" Data Collection and Processing PPT Courseware 2 Courseware Description This lesson is to understand the necessity and importance of analyzing the fluctuation degree of a set of data in a specific problem situation, by analyzing the scatter points of two sets of data with close averages Graphical representation, intuitively feel the data wave...

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Update Time: 2024-09-06

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