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

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

Part One: Analysis of the New Course

Question 1 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?

To solve question 1, a statistical survey is needed.

First, you can use a questionnaire survey method to collect data from the whole class. For this purpose, a questionnaire should be designed.

Questionnaire

Among the following five types of TV programs, which one is your favorite ( ) (single choice)

A News B Sports C Animation D Entertainment E Opera

When completed, please give the questionnaire to the math class representative.

Using questionnaires, we can collect the numbers (letters) of each student's favorite program in the class. We call them data. For example, the following 50 data:

C C A D B C A D C D

C E A B D D B C C C

D B D C D D D C D C

E B B D D C C E B D

A B D D C B C B D D

From the above data, can you tell how much the class likes various programs?

Statistical survey PPT, part 2: in-class exercises

In order to understand the students’ extracurricular life, 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.

The solution is unreasonable. Because the contents of options B and D are repeated, and the four options listed are only part of the extracurricular activities. You can change option D to "other".

After investigation, among the means of transportation used by students in a certain class to go to school, bicycles account for 60%, buses account for 30%, and others account for 10%. Please draw a fan chart to describe the above statistical data.

Please give some examples of the use of comprehensive investigations in your life.

Solution: Such as the seventh national census that will be carried out in 2020; the security inspection of passengers’ luggage at the airport when taking a plane; adjusting the eyesight of the students in this class, etc.

Statistical Survey PPT, Part 3: Class Summary

What are the advantages and disadvantages of bar charts and pie charts when reflecting statistical information?

Bar chart

Easily compare differences between each set of data

It is not easy to display the size of each set of data relative to the population

fan chart

Easily display the size of each set of data relative to the population

Unable to determine the absolute size of each group of numbers

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Update Time: 2024-11-20

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