"Modality" PPT courseware 4

Description

"Modality" PPT courseware 4

induction

Definition: In a set of data, the data that appears most frequently is called the mode of this set of data.

Note: (1) The mode is the data that appears most frequently in a set of data. It is the original data in a set of data, not the corresponding number.

(2) Sometimes there is more than one mode in a set of data. For example, in the data 2, 3, -1, 2, 1, and 3, both 2 and 3 appear twice. They are both the modes of this set of data.

try your hand

1.The mode of the data 11, 8, 2, 7, 9, 2, 7, 3, 2, 0, 5 is ____________,

2.The mode of the data 15, 20, 20, 22,30,30 is ____________,

3. Insert a data x into the data -1, 0, 4, 5, 8 so that the median of this set of data is 3, then x=_____

4. The mode of data 8, 8, x, 6 is the same as the mean, then their median is ______

5. (High School Entrance Examination Link) Five positive integers are arranged from small to large. If the median of this set of data is 3, the mode is 7 and unique, then the sum of these five positive integers is ()

A.20 B.21 C.22 D.23

reward

What did you gain from studying this class?

1. Definition of mode

2. Summary of methods:

The mode can be directly calculated from the given data. (There may be more than one mode in a set of data. The mode is the data that appears most often in a set of data, not the number of times the data appears. If there are two data If it appears the same number of times and appears more often than other data, then these two data are the mode of this set of data).

Integrate everything

In this lesson, we learned about the concept of mode and understood their different angles and scope of application when describing the "average" of a set of data. So can you tell what characteristics of the data each reflect in the mean, median, and mode based on actual facts?

Knowledge network: The average, mode and median are all characteristic numbers that describe the central tendency of a set of data, but their description angles and scope of application are different.

The size of the average is related to each data in a set of data, and any change in the data will cause a corresponding change in the average;

The mode focuses on the frequency of occurrence of each data, and its size is only related to part of the data in this set of data. When a lot of data in a set of data appear repeatedly many times, its mode is often a statistic we care about;

The median is only related to the arrangement position of the data, and changes in certain data have no impact on its median. When individual data in a set of data vary greatly, it can be used to describe its central tendency.

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"Median and Mode" data analysis PPT teaching courseware:

"Median and Mode" data analysis PPT teaching courseware, 14 pages in total. Part One: Knowledge Points Basic Knowledge Point 1 Median 1. A set of 6 numbers: 15, 16, 18, 20, 22, 22, then the median of this set of data is (C) A.22 B. 20 C.19 D.18 2.1..

"Median and Mode" data analysis PPT download:

"Median and Mode" data analysis PPT download, 20 pages in total. The first part of the content: Learning target median mode... ... ... Median and mode PPT, the second part of the content: Understanding new knowledge points Median 1. Definition: Generally, n numbers ..

"Median and Mode" data analysis PPT:

"Median and Mode" data analysis PPT, 27 pages in total. Part One: Learning Objectives 1. Master the meaning of median and mode. (Key points) 2. Be able to make preliminary judgments on the data based on the differences between the mean, median and mode. (difficult)...

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Update Time: 2024-07-30

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

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