"Average" data analysis PPT download (Lesson 1)

Description

"Average" data analysis PPT download (Lesson 1), 24 pages in total.

Part One: Learning Objectives

arithmetic mean

Weighted average ("weight" expressed as a proportion or percentage)

Average PPT, part 2: Gaining new knowledge

Knowledge point Arithmetic mean

Summarize

When the data information is presented in the form of tables or images, it is necessary to understand the tables or images according to the conditions and obtain useful information from them. After removing the highest score and the lowest score in this question, the number of data has also changed. Calculate Don't forget this when averaging your scores. To find the average, remember that the sum of the data is divided by the total number of data.

Knowledge point Weighted average ("weight" expressed as a proportion or percentage)

Summarize

This question actually tests how to find the average, which is a reverse application process of the weighted average formula. After establishing the corresponding system of equations, some of the unknown data can be determined.

Average PPT, Part 3: Class Summary

The connection and difference between arithmetic mean and weighted average:

Connection: If the weights of each data are the same, the weighted average is the arithmetic mean. Therefore, it can be seen that the arithmetic mean is essentially a special case of the weighted average.

Difference: The arithmetic mean refers to the sum of a set of data divided by the number of data. The weighted average means that in practical problems, the "importance" of a set of data may not be the same, that is, the weight of each data may not be the same, so in calculation It is different from the arithmetic mean.

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

For more information about the "Analysis of Data Average" PPT courseware, please click the "Analysis of Data PPT Average 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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