"Statistical Survey" data collection, organization and description PPT download (comprehensive survey in the first lesson)

Description

"Statistical Survey" data collection, organization and description PPT download (comprehensive survey in the first lesson)

Part 1: Importing new lessons

Scenario introduction

In class, the teacher asked all the students about a certain topic, and the students raised their hands one after another.

Statistical survey PPT, part 2: teaching new lessons

full investigation

What would you do if you wanted to know the class's preference for TV programs in five categories: news, sports, animation, entertainment, and opera? How to investigate?

1. Design questionnaire survey

If we want to further understand the differences between boys and girls’ favorite programs, what else should be included in the questionnaire?

A gender item should be added to the questionnaire.

2. Collect data

Using a questionnaire, you can collect the numbers (letters) of each student's favorite program in the class, which we call data.

Cooperation and exchange

After investigation, a classmate obtained the following 50 data:

CCADBCADCD

CEABDDBCCC

DBDCDDDCDC

EBBDDCCEBD

ABDDCBCBDD

Discussion: From the above data, can you tell how much the class likes various programs? How can we clearly see how much the class likes various programs?

3. Organize data

In order to more clearly understand the patterns contained in the data, the data needs to be organized. Tables are often used to organize the data in statistics (as shown in the table below)

4. Data description

The table above can clearly reflect the preference of the entire class for various programs.

In order to see the information in the table more intuitively, bar charts and fan charts can also be used to describe the data.

Statistical survey PPT, part three: practice in class

1. In order to understand the extracurricular life of students, Xiao Ming designed the following survey questions: Your favorite extracurricular activity is ( )

A. Reading extracurricular books B. Sports activities

C.Watching TV D.Playing football

Do you think the answer options for this question are well designed? Why? If it is unreasonable, please modify it.

Unreasonable, option B includes option D, option D can be changed to "painting"

2. Among the following investigations, the comprehensive investigation method is suitable for ()

A. Understand the lifespan of a batch of ballpoint pens

B. Understand the height status of ninth-grade students across the country

C. Survey people’s awareness of protecting the ocean

D. Inspecting various parts of a launch vehicle used to launch satellites

3. Make statistics on the mathematics scores of 40 students in a class. After proper grouping, the number of people in the score range of 80 to 90 points is: " " Then the percentage of the number of people in this class in this score range to the whole class is ( )

A. 20% B. 40%

C. 15% D. 25%

Statistical Survey PPT, Part 4: Class Summary

One table - statistical table

The second picture - bar chart, fan chart

Three Notes - ① Questionnaire: Reasonable and scientific design

②Statistical table: Complete items and accurate data

③Statistical chart: Accurate proportions and no missing annotations

Four steps - collect data, organize data, describe data, analyze data

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For more information about the PPT courseware "Data Collection, Arrangement and Description of Statistical Investigation and Comprehensive Investigation", please click on the Data Collection, Arrangement and Description of PPT Statistical Investigation and PPT Comprehensive Investigation PPT tab.

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Update Time: 2024-10-23

This template belongs to Mathematics courseware People's Education Press Seventh Grade Mathematics Volume 2 industry PPT template

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