"Frequency Distribution Table and Histogram" PPT courseware

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"Frequency Distribution Table and Histogram" PPT courseware

Part One: Preparation before class

Questionnaire: Books are the ladder of human progress. What kind of books do students like to read most after class?

A. Literature ( ) B. Comics ( )

C. Popular science ( ) D. History ( )

The following are the books that Xiaoliang surveyed 50 students in Class 7 (1). 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

Based on the above results, can you quickly tell which type of books the students in this class like to read the most? What is his data representation?

Frequency distribution table and histogram PPT, part 2: introduction of new lessons

(1) Can you use appropriate statistical charts to represent the English scores of the students in this class when they entered school?

From your chart, can you tell which level most students are at?

What is the overall distribution of grades?

(2) Can you use appropriate statistical charts to represent the Chinese scores of the students in this class when they entered school? From your chart, can you tell which score range most students are in? What is the overall distribution of grades?

Frequency histogram is a special type of bar chart that groups the data of statistical objects. Plotted on the horizontal axis, the vertical axis represents the frequency of each group of data.

If there is a lot of data in the sample and the data gap is relatively large, the frequency histogram can reflect the overall situation of the data more clearly and intuitively.

Frequency distribution table and histogram PPT, the third part: Lecture 1

Question 1: In order to participate in the radio gymnastics competition between school grades, the second grade students are going to select 40 students of similar heights from 63 students to participate in the competition. For this purpose, the height (cm) data of 63 students were collected as follows:

There is no fixed standard for determining the group distance and number of groups. It must be determined based on experience and specific research problems. Usually, the more data there is, the more groups it is divided into. When the data is within 100, it is usually divided into 5 to 12 groups depending on the amount of data.

1. Calculate the maximum and minimum values.

In the above data: the minimum value is 149 and the maximum value is 172.

The difference between them is 23. This means that the total range of height changes is 23.

2. Determine the group distance and number of groups.

3. Determine the points

4. Column frequency distribution table: Accumulate the data falling in each group and obtain the number of data in each group (called frequency). After sorting, the following frequency distribution table can be obtained:

5. Draw a frequency distribution histogram: Use the horizontal axis to represent height, and use the vertical and horizontal axis to represent frequency. With the frequency of each group as the highest, draw a rectangle corresponding to this group to obtain the frequency distribution histogram below.

Keywords: Free download of Hebei Education Edition mathematics PPT courseware for eighth grade volume 2, frequency distribution table and histogram PPT download, .PPT format;

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"Frequency Distribution Table and Histogram" PPT download:

"Frequency Distribution Table and Histogram" PPT Download Part One Content: Review Do you still remember the characteristics of each statistical chart: Bar chart can clearly show the specific number of each item. Line chart can clearly reflect changes in things. situation. Sector..

"Frequency Distribution Table and Histogram" PPT:

"Frequency Distribution Table and Histogram" PPT Part One Content: New Lesson Exploration In order to understand the market share of different brands of beverages, Xiaoliang and Xiaoming chose a supermarket to conduct a survey and recorded the brands of beverages purchased by 50 customers that day. Use the letters K,B,L,C...

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Update Time: 2024-10-05

This template belongs to Mathematics courseware Hebei Education Edition Eighth Grade Mathematics Volume 2 industry PPT template

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