"Dispersion Degree of Data" Data Analysis PPT

Description

"Dispersion Degree of Data" Data Analysis PPT, 23 pages in total.

Part One: Learning Objectives

1. Understand the meaning of range and master the calculation method of range. (emphasis)

2. Understand the meaning of variance and standard deviation, and be able to use sample variance and standard deviation to estimate the population variance and standard deviation. (main difficulty)

Dispersion degree of data PPT, part 2 content: teaching new lessons

Very poor

Question: In order to improve the international competitiveness of agricultural and sideline products, some industry associations have divided the specifications of agricultural and sideline products.

A foreign trade company wants to export a batch of 75 g chicken legs. There are currently two manufacturers providing supply. Their prices are the same and the quality of the chicken legs is similar.

In conclusion

In real life, in addition to caring about the "average level" of data, people also pay attention to the degree of dispersion of data, that is, their deviation from the average level. Range is a statistic that describes the degree of dispersion of data.

Range refers to the difference between the largest data and the smallest data in a set of data.

Variance and standard deviation

Dispersion degree of data PPT, the third part: practice in class

1. For two classes (1) and (2) of eighth grade students with the same number of students, in the same mathematics unit test, the class average score and variance are as follows: Then the class with more stable scores is ( )

A. Class A B. Class B

C. The results of both classes are equally stable D. Unable to determine

2. In the calculation formula of sample variance, the number 10 represents ________ and the number 20 represents ______.

Dispersion degree of data PPT, part 4 content: Class summary

Very poor

variance

standard deviation

Keywords: Free download of Beijing Normal University edition eighth-grade mathematics PPT courseware for volume 1, data discreteness PPT download, data analysis PPT download, .PPT format;

For more information about the "Data Analysis and Dispersion Degree of Data" PPT courseware, please click on the Data Analysis PPT and Data Dispersion Degree PPT tab.

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Update Time: 2024-11-21

This template belongs to Mathematics courseware Beijing Normal University Edition Eighth Grade Mathematics Volume 1 industry PPT template

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