"Data Collation" PPT courseware

Description

"Data Collation" PPT courseware

Do it

Among the four colors given below, which one is your favorite?

How do you plan to conduct a survey to find out which color our class’s favorite color is?

To this end, Xiao Ming from the second grade (1) class of Guangming Middle School launched a survey among 50 students in the class. The results are as follows:

A A B C D A B A A C

B A A C B C A A B C

A A B A C D A A C D

B A C D A A A C D A

C B A A C C D A A C

definition

We call the number of times each object appears as frequency (absolute frequency), and the ratio of the number of times each object appears to the total number of times is frequency (relative frequency).

Practice in class

1. What is the frequency and frequency of the letter "h" appearing in "I like maths very much."?

2. (1) What investigation method was used in this investigation?

(2) What does "70" in the table mean? What about "24.73"?

3. In a mathematics competition in which 200 students participated, in order to intuitively understand the test situation, the scores of the contestants were counted. Please answer the following questions based on the table below and Figure 3:

Discuss

1. Which Chinese character do you think is used most frequently?

2. Please design a simple survey plan to verify whether your guess is correct.

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"Data Collation and Representation" PPT courseware:

Contents of the first part of the PPT courseware "Data Collation and Presentation": Classroom Questions Question 1 Since liberation, my country's gross domestic product (GDP) has been on an increasing trend, from only 67.9 billion yuan in 1952 to 114.93 billion yuan in 1962 and 114.93 billion yuan in 1970. It rose to 2252.7 in the year..

"Data Arrangement and Presentation" PPT:

"Data Arrangement and Presentation" PPT Part One Content: New Lesson Introduction 1. Basic Definitions: 1. Census: A comprehensive survey of the objects under investigation for a certain purpose, called census 2. Overall: The overall name of the objects under investigation for the overall. 3. Individual: Group..

"Data Collation" PPT Courseware 2:

"Data Collation" PPT Courseware 2 Observation and Thinking 1. Aunt Li, a salesperson in the shopping mall, sold 20 pairs of telekinetic shoes in one day. Record the size of each pair of shoes in the order of sale (unit: cm): 24.5 27 23.5 24 24.5 25 26 26 24 24.5 25..

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Update Time: 2024-10-05

This template belongs to Mathematics courseware Qingdao Edition Seventh Grade Mathematics Volume 1 industry PPT template

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