"Statistical Survey" data collection, arrangement and description PPT courseware 4

Description

"Statistical Survey" data collection, arrangement and description PPT courseware 4

design the research survey

Questionnaire year month day

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

A News B Sports C Animation

D entertainment E opera

When completed, please return the questionnaire to your math class representative.

1. A bar chart uses one unit length to represent a certain quantity. According to the quantity, straight bars of different lengths are drawn (referring to the vertical bars in the picture). The greater the quantity, the longer it will be.

2. A sector chart uses a circle to represent the total quantity of each part, and uses sectors of different sizes in the circle to show how many percent of the total quantity each part accounts for. This statistical chart can clearly reflect each part. The relationship between quantity and total quantity.

3. How to draw a fan chart?

(1) Calculate the percentage (2) Calculate the central angle of the circle (3) Draw the circle and sector and indicate the percentage

Compare who is the best

1. Select appropriate statistical charts to represent the following data:

In 2000, the average monthly consumer expenditure per person was 446 yuan, of which food accounted for 40.6%, clothing 12.2%, household equipment, supplies and services 7.0%, medical care 5.9%, transportation and communications 8.7%, entertainment, education and cultural services 12.7%. Residence 8.6%, miscellaneous goods 4.3%.

Solution: This set of data represents the percentage of each part, and it is appropriate to use a fan chart.

2. A school conducted a survey on the schooling methods of 800 seventh-grade students, as shown in the figure:

Then the number of people taking the bus accounts for _____ of the total number of people, and there are _____ people.

3. Through the investigation of the development of fast food companies in a certain area from 1998 to 2000, Xiao Li made a bar chart of the number of fast food companies in the area ① and a bar chart of the average annual sales of lunch boxes of fast food companies ②. Use the information provided by Figure ① and Figure ② to answer the following questions.

(1) In 2000, there were ____ fast food companies in the area;

(2) In 1999, the average annual sales volume of lunch boxes of each fast food company was ( ) million boxes. In 2000, the annual sales volume of box lunch boxes of each fast food company was ( ) million boxes.

(3) In 2000, fast food companies in this region sold a total of ( ) million boxes of lunch boxes.

summary

What did we learn in today’s lesson?

1. Know how to record data using scratch notation.

2. Know how to use bar charts and fan charts to describe data. Master related concepts;

3. Understand and compare the advantages and characteristics of bar charts and fan charts;

4. Learn how to obtain information from charts and solve practical problems.

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Update Time: 2024-10-03

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

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