"Histogram" data collection, organization and description PPT free courseware

Description

"Histogram" data collection, organization and description PPT free courseware

Part One: Analysis of New Knowledge

We have learned methods of describing data such as bar charts, line charts, and fan charts. Next, we will introduce another statistical chart commonly used to describe data-histograms.

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

158 158 160 168 159 159 151 158 159

168 158 154 158 154 169 158 158 158

159 167 170 153 160 160 159 159 160

149 163 163 162 172 161 153 156 162

162 163 157 162 162 161 157 157 164

155 156 165 166 156 154 166 164 165

156 157 153 165 159 157 155 164 156

Which height range should students be selected to participate?

In order to make the selected contestants' heights more uniform, it is necessary to know the distribution of the data (height), that is, in which height ranges there are more students and in which height ranges there are fewer students. This can be done by appropriately grouping the data. tidy.

1. Calculate the difference between the maximum value and the minimum value

In the above data, the minimum value is 149, the maximum value is 172, and the difference between the maximum value and the minimum value is 23, indicating that the range of height changes is 23.

2. Determine the group spacing and number of groups

Divide all the data into several groups. The distance between the two endpoints of each group (the value range of the data in the group) is called the group distance. According to the needs of the problem, the group distance of each group can be the same or different. In this question We make equally spaced groups, that is, the distance between each group is the same.

3. Column frequency distribution table

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

Histogram PPT, Part 2: In-class exercises

The following data is the age of the Fields Medal winners as of 2010:

29 39 35 33 39 28 33 35

31 31 37 32 38 36 31 39

32 38 37 34 29 34 38 32

35 36 33 29 32 35 36 37

39 38 40 38 37 39 38 34

33 40 36 36 37 40 31 38

38 40 40 37

Please list the frequency distribution table according to the following different grouping methods, draw the frequency distribution histogram, and compare which grouping can better explain the age distribution of Fields Medal winners when they were awarded:

(1) The group interval is 2, and each group is 28 ≤ x < 30, 30 ≤ x < 32,...;

(2) The group interval is 5, and each group is 25 ≤ x < 30, 30 ≤ x < 35,...;

(3) The group interval is 10, and each group is 20 ≤ x < 30, 30 ≤ x < 40,….

Keywords: free download of PPT courseware for mathematics in the second volume of the seventh grade of the People's Education Press, download of histogram PPT, download of data collection, organization and description PPT, .PPT format;

For more information about the PPT courseware "Collection, Organization and Description of Data Histogram", please click the "Collection, Organization and Description of Data PPT Histogram PPT" tab.

"Histogram" data collection, organization and description PPT courseware download:

"Histogram" Data Collection, Arrangement and Description PPT Courseware Download Part One Content: Learning Objectives: Master the basic steps of using frequency distribution histograms to describe data distribution; (Key Points) Be able to use simple frequency distribution histograms to explain the characteristics contained in the data information,..

"Histogram" data collection, organization and description PPT teaching courseware:

"Histogram" data collection, arrangement and description PPT teaching courseware Part 1: Review Do you still remember the characteristics of each statistical chart? Bar charts can clearly show the specific number of each item. Line charts can clearly reflect things.

"Histogram" data collection, organization and description PPT download:

"Histogram" Data Collection, Arrangement and Description PPT Download Part One: Learning Objectives: Be able to recognize histograms, draw histograms, and use histograms to interpret the information contained in the data. ... ... ... Histogram PPT, part 2: exploration...

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Update Time: 2024-10-03

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