"Data Collection" Data Collection and Processing PPT Courseware 5

Description

"Data Collection" Data Collection and Processing PPT Courseware 5

1. Is the data useful?

What is our favorite physical activity?

Do your classmates often sweep the floor at home?

What methods do teachers and classmates use to go to school?

Do you have breakfast before going to school every day?

2. Data collection steps

(1) Clarify the investigation problem—which option to choose?

(2) Determine the target of the investigation—every student in the class

(3) Select the survey method—opinion poll method

(4) Launch investigation - vote

(5) Record the results - count the votes

(6) Draw conclusions - determine the investigation plan

The following surveys are suitable for collecting data using the election method ( )

A. Who scored the most goals in the World Cup;

B. What holiday is June 1st?

C. Who got first place in the final exam;

D. Who is most suitable to be the math class representative?

Since the reform and opening up, my country's national economy has maintained a good momentum of development, and its GDP has continued to grow rapidly. The figure below is a statistical chart of GDP from 1998 to 2002. Based on the information in the figure, answer the following questions:

(1) The GDP in 1999 was _______.

(2) It is known that the GDP in 2002 increased by 1.2956 billion yuan compared with 2000, and the GDP in 2001 increased by 649.1 billion yuan compared with 2000. Find the percentage growth rate of the GDP in 2002 compared with 2001. (The result retains two significant figures)

Summary

1. Methods of collecting data

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

2. Use data to help decision-making - let the data speak

Data speaks. Data is useful.

How to let data speak Data collection

How data speaks Data analysis

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Update Time: 2024-09-09

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

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